Home / 81,432,001.20-122,148,001.80-72,503,792.40

Finding the Fourth Proportional to 81,432,001.20, 122,148,001.80 and 72,503,792.40

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Solution

The fourth proportional to 81,432,001.20, 122,148,001.80 and 72,503,792.40 is: 108,755,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,432,001.20 : 122,148,001.80 = 72,503,792.40 : x
  2. Step 2: Convert to fraction form
    81,432,001.20/122,148,001.80 = 72,503,792.40/x
  3. Step 3: Cross multiply
    81,432,001.20x = 122,148,001.80 × 72,503,792.40
  4. Step 4: Simplify right side
    81,432,001.20x = 8,856,193,364,582,027
  5. Step 5: Solve for x
    x = 8,856,193,364,582,027/81,432,001.20
  6. Step 6: Final answer
    x = 108,755,688.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.