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Finding the Fourth Proportional to 81,509.90, 112,489.11 and 45,702.23

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Solution

The fourth proportional to 81,509.90, 112,489.11 and 45,702.23 is: 63,072.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,509.90 : 112,489.11 = 45,702.23 : x
  2. Step 2: Convert to fraction form
    81,509.90/112,489.11 = 45,702.23/x
  3. Step 3: Cross multiply
    81,509.90x = 112,489.11 × 45,702.23
  4. Step 4: Simplify right side
    81,509.90x = 5,141,002,615.27
  5. Step 5: Solve for x
    x = 5,141,002,615.27/81,509.90
  6. Step 6: Final answer
    x = 63,072.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.