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Finding the Fourth Proportional to 84,499.56, 126,702.90 and 28,310.13

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Solution

The fourth proportional to 84,499.56, 126,702.90 and 28,310.13 is: 42,449.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,499.56 : 126,702.90 = 28,310.13 : x
  2. Step 2: Convert to fraction form
    84,499.56/126,702.90 = 28,310.13/x
  3. Step 3: Cross multiply
    84,499.56x = 126,702.90 × 28,310.13
  4. Step 4: Simplify right side
    84,499.56x = 3,586,975,570.38
  5. Step 5: Solve for x
    x = 3,586,975,570.38/84,499.56
  6. Step 6: Final answer
    x = 42,449.64

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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.