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Finding the Fourth Proportional to 147,728.52, 221,592.78 and 68,897.88

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Solution

The fourth proportional to 147,728.52, 221,592.78 and 68,897.88 is: 103,346.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,728.52 : 221,592.78 = 68,897.88 : x
  2. Step 2: Convert to fraction form
    147,728.52/221,592.78 = 68,897.88/x
  3. Step 3: Cross multiply
    147,728.52x = 221,592.78 × 68,897.88
  4. Step 4: Simplify right side
    147,728.52x = 15,267,272,765.31
  5. Step 5: Solve for x
    x = 15,267,272,765.31/147,728.52
  6. Step 6: Final answer
    x = 103,346.82

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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.