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Finding the Fourth Proportional to 408,972.90, 613,552.65 and 124,688.87

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Solution

The fourth proportional to 408,972.90, 613,552.65 and 124,688.87 is: 187,061.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,972.90 : 613,552.65 = 124,688.87 : x
  2. Step 2: Convert to fraction form
    408,972.90/613,552.65 = 124,688.87/x
  3. Step 3: Cross multiply
    408,972.90x = 613,552.65 × 124,688.87
  4. Step 4: Simplify right side
    408,972.90x = 76,503,185,730.17
  5. Step 5: Solve for x
    x = 76,503,185,730.17/408,972.90
  6. Step 6: Final answer
    x = 187,061.75

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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.