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Finding the Fourth Proportional to 218,781.61, 328,172.42 and 52,569.61

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Solution

The fourth proportional to 218,781.61, 328,172.42 and 52,569.61 is: 78,854.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,781.61 : 328,172.42 = 52,569.61 : x
  2. Step 2: Convert to fraction form
    218,781.61/328,172.42 = 52,569.61/x
  3. Step 3: Cross multiply
    218,781.61x = 328,172.42 × 52,569.61
  4. Step 4: Simplify right side
    218,781.61x = 17,251,895,048.88
  5. Step 5: Solve for x
    x = 17,251,895,048.88/218,781.61
  6. Step 6: Final answer
    x = 78,854.41

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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.