Home / 81,459,007.20-122,188,510.80-30,330,446.40

Finding the Fourth Proportional to 81,459,007.20, 122,188,510.80 and 30,330,446.40

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Solution

The fourth proportional to 81,459,007.20, 122,188,510.80 and 30,330,446.40 is: 45,495,669.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,459,007.20 : 122,188,510.80 = 30,330,446.40 : x
  2. Step 2: Convert to fraction form
    81,459,007.20/122,188,510.80 = 30,330,446.40/x
  3. Step 3: Cross multiply
    81,459,007.20x = 122,188,510.80 × 30,330,446.40
  4. Step 4: Simplify right side
    81,459,007.20x = 3,706,032,077,515,221
  5. Step 5: Solve for x
    x = 3,706,032,077,515,221/81,459,007.20
  6. Step 6: Final answer
    x = 45,495,669.60

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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.