Home / 80,862,447.10-121,293,670.65-72,128,443.90

Finding the Fourth Proportional to 80,862,447.10, 121,293,670.65 and 72,128,443.90

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Solution

The fourth proportional to 80,862,447.10, 121,293,670.65 and 72,128,443.90 is: 108,192,665.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,862,447.10 : 121,293,670.65 = 72,128,443.90 : x
  2. Step 2: Convert to fraction form
    80,862,447.10/121,293,670.65 = 72,128,443.90/x
  3. Step 3: Cross multiply
    80,862,447.10x = 121,293,670.65 × 72,128,443.90
  4. Step 4: Simplify right side
    80,862,447.10x = 8,748,723,718,903,603
  5. Step 5: Solve for x
    x = 8,748,723,718,903,603/80,862,447.10
  6. Step 6: Final answer
    x = 108,192,665.85

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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.