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Finding the Fourth Proportional to 218,937.36, 328,456.08 and 69,176.88

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Solution

The fourth proportional to 218,937.36, 328,456.08 and 69,176.88 is: 103,781.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,937.36 : 328,456.08 = 69,176.88 : x
  2. Step 2: Convert to fraction form
    218,937.36/328,456.08 = 69,176.88/x
  3. Step 3: Cross multiply
    218,937.36x = 328,456.08 × 69,176.88
  4. Step 4: Simplify right side
    218,937.36x = 22,721,566,831.43
  5. Step 5: Solve for x
    x = 22,721,566,831.43/218,937.36
  6. Step 6: Final answer
    x = 103,781.13

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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.