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Finding the Fourth Proportional to 147,911.20, 221,737.20 and 88,770.40

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Solution

The fourth proportional to 147,911.20, 221,737.20 and 88,770.40 is: 133,077.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,911.20 : 221,737.20 = 88,770.40 : x
  2. Step 2: Convert to fraction form
    147,911.20/221,737.20 = 88,770.40/x
  3. Step 3: Cross multiply
    147,911.20x = 221,737.20 × 88,770.40
  4. Step 4: Simplify right side
    147,911.20x = 19,683,699,938.88
  5. Step 5: Solve for x
    x = 19,683,699,938.88/147,911.20
  6. Step 6: Final answer
    x = 133,077.82

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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.