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Finding the Fourth Proportional to 147,809.80, 221,459.55 and 68,761.90

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Solution

The fourth proportional to 147,809.80, 221,459.55 and 68,761.90 is: 103,024.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,809.80 : 221,459.55 = 68,761.90 : x
  2. Step 2: Convert to fraction form
    147,809.80/221,459.55 = 68,761.90/x
  3. Step 3: Cross multiply
    147,809.80x = 221,459.55 × 68,761.90
  4. Step 4: Simplify right side
    147,809.80x = 15,227,979,431.15
  5. Step 5: Solve for x
    x = 15,227,979,431.15/147,809.80
  6. Step 6: Final answer
    x = 103,024.15

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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.