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Finding the Fourth Proportional to 81,617.49, 112,672.01 and 63,425.30

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Solution

The fourth proportional to 81,617.49, 112,672.01 and 63,425.30 is: 87,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,617.49 : 112,672.01 = 63,425.30 : x
  2. Step 2: Convert to fraction form
    81,617.49/112,672.01 = 63,425.30/x
  3. Step 3: Cross multiply
    81,617.49x = 112,672.01 × 63,425.30
  4. Step 4: Simplify right side
    81,617.49x = 7,146,255,631.06
  5. Step 5: Solve for x
    x = 7,146,255,631.06/81,617.49
  6. Step 6: Final answer
    x = 87,557.90

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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.