Home / 80,862,432.60-121,293,648.90-72,128,429.40

Finding the Fourth Proportional to 80,862,432.60, 121,293,648.90 and 72,128,429.40

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Solution

The fourth proportional to 80,862,432.60, 121,293,648.90 and 72,128,429.40 is: 108,192,644.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,862,432.60 : 121,293,648.90 = 72,128,429.40 : x
  2. Step 2: Convert to fraction form
    80,862,432.60/121,293,648.90 = 72,128,429.40/x
  3. Step 3: Cross multiply
    80,862,432.60x = 121,293,648.90 × 72,128,429.40
  4. Step 4: Simplify right side
    80,862,432.60x = 8,748,720,391,352,039
  5. Step 5: Solve for x
    x = 8,748,720,391,352,039/80,862,432.60
  6. Step 6: Final answer
    x = 108,192,644.10

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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.