Home / 128,746,838.91-177,665,231.46-72,996,010.81

Finding the Fourth Proportional to 128,746,838.91, 177,665,231.46 and 72,996,010.81

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Solution

The fourth proportional to 128,746,838.91, 177,665,231.46 and 72,996,010.81 is: 100,731,429.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,746,838.91 : 177,665,231.46 = 72,996,010.81 : x
  2. Step 2: Convert to fraction form
    128,746,838.91/177,665,231.46 = 72,996,010.81/x
  3. Step 3: Cross multiply
    128,746,838.91x = 177,665,231.46 × 72,996,010.81
  4. Step 4: Simplify right side
    128,746,838.91x = 12,968,853,156,215,314
  5. Step 5: Solve for x
    x = 12,968,853,156,215,314/128,746,838.91
  6. Step 6: Final answer
    x = 100,731,429.73

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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.