Home / 80,781,921.72-121,172,007.78-64,531,636.92

Finding the Fourth Proportional to 80,781,921.72, 121,172,007.78 and 64,531,636.92

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Solution

The fourth proportional to 80,781,921.72, 121,172,007.78 and 64,531,636.92 is: 96,796,756.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,781,921.72 : 121,172,007.78 = 64,531,636.92 : x
  2. Step 2: Convert to fraction form
    80,781,921.72/121,172,007.78 = 64,531,636.92/x
  3. Step 3: Cross multiply
    80,781,921.72x = 121,172,007.78 × 64,531,636.92
  4. Step 4: Simplify right side
    80,781,921.72x = 7,819,428,010,926,376
  5. Step 5: Solve for x
    x = 7,819,428,010,926,376/80,781,921.72
  6. Step 6: Final answer
    x = 96,796,756.56

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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.