Home / 129,901,380.57-179,263,890.32-77,690,407.86

Finding the Fourth Proportional to 129,901,380.57, 179,263,890.32 and 77,690,407.86

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Solution

The fourth proportional to 129,901,380.57, 179,263,890.32 and 77,690,407.86 is: 107,212,753.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,901,380.57 : 179,263,890.32 = 77,690,407.86 : x
  2. Step 2: Convert to fraction form
    129,901,380.57/179,263,890.32 = 77,690,407.86/x
  3. Step 3: Cross multiply
    129,901,380.57x = 179,263,890.32 × 77,690,407.86
  4. Step 4: Simplify right side
    129,901,380.57x = 13,927,084,753,142,654
  5. Step 5: Solve for x
    x = 13,927,084,753,142,654/129,901,380.57
  6. Step 6: Final answer
    x = 107,212,753.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.