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Finding the Fourth Proportional to 99,342.80, 149,014.20 and 82,721.60

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Solution

The fourth proportional to 99,342.80, 149,014.20 and 82,721.60 is: 124,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,342.80 : 149,014.20 = 82,721.60 : x
  2. Step 2: Convert to fraction form
    99,342.80/149,014.20 = 82,721.60/x
  3. Step 3: Cross multiply
    99,342.80x = 149,014.20 × 82,721.60
  4. Step 4: Simplify right side
    99,342.80x = 12,326,693,046.72
  5. Step 5: Solve for x
    x = 12,326,693,046.72/99,342.80
  6. Step 6: Final answer
    x = 124,082.40

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1.5x scale

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.