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Finding the Fourth Proportional to 220,565.76, 304,364.16 and 129,929.60

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Solution

The fourth proportional to 220,565.76, 304,364.16 and 129,929.60 is: 179,293.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,565.76 : 304,364.16 = 129,929.60 : x
  2. Step 2: Convert to fraction form
    220,565.76/304,364.16 = 129,929.60/x
  3. Step 3: Cross multiply
    220,565.76x = 304,364.16 × 129,929.60
  4. Step 4: Simplify right side
    220,565.76x = 39,545,913,563.14
  5. Step 5: Solve for x
    x = 39,545,913,563.14/220,565.76
  6. Step 6: Final answer
    x = 179,293.08

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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.