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Finding the Fourth Proportional to 99,472.80, 149,290.80 and 98,695.20

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Solution

The fourth proportional to 99,472.80, 149,290.80 and 98,695.20 is: 148,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,472.80 : 149,290.80 = 98,695.20 : x
  2. Step 2: Convert to fraction form
    99,472.80/149,290.80 = 98,695.20/x
  3. Step 3: Cross multiply
    99,472.80x = 149,290.80 × 98,695.20
  4. Step 4: Simplify right side
    99,472.80x = 14,734,285,364.16
  5. Step 5: Solve for x
    x = 14,734,285,364.16/99,472.80
  6. Step 6: Final answer
    x = 148,123.76

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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.