Home / 81,432,078.20-122,148,117.30-72,503,869.40

Finding the Fourth Proportional to 81,432,078.20, 122,148,117.30 and 72,503,869.40

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Solution

The fourth proportional to 81,432,078.20, 122,148,117.30 and 72,503,869.40 is: 108,755,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,432,078.20 : 122,148,117.30 = 72,503,869.40 : x
  2. Step 2: Convert to fraction form
    81,432,078.20/122,148,117.30 = 72,503,869.40/x
  3. Step 3: Cross multiply
    81,432,078.20x = 122,148,117.30 × 72,503,869.40
  4. Step 4: Simplify right side
    81,432,078.20x = 8,856,211,144,175,081
  5. Step 5: Solve for x
    x = 8,856,211,144,175,081/81,432,078.20
  6. Step 6: Final answer
    x = 108,755,804.10

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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.