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Finding the Fourth Proportional to 147,657.60, 221,551.20 and 68,731.20

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Solution

The fourth proportional to 147,657.60, 221,551.20 and 68,731.20 is: 103,126.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,657.60 : 221,551.20 = 68,731.20 : x
  2. Step 2: Convert to fraction form
    147,657.60/221,551.20 = 68,731.20/x
  3. Step 3: Cross multiply
    147,657.60x = 221,551.20 × 68,731.20
  4. Step 4: Simplify right side
    147,657.60x = 15,227,479,837.44
  5. Step 5: Solve for x
    x = 15,227,479,837.44/147,657.60
  6. Step 6: Final answer
    x = 103,126.96

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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.