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Finding the Fourth Proportional to 111,238.31, 153,508.87 and 63,490.64

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Solution

The fourth proportional to 111,238.31, 153,508.87 and 63,490.64 is: 87,617.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,238.31 : 153,508.87 = 63,490.64 : x
  2. Step 2: Convert to fraction form
    111,238.31/153,508.87 = 63,490.64/x
  3. Step 3: Cross multiply
    111,238.31x = 153,508.87 × 63,490.64
  4. Step 4: Simplify right side
    111,238.31x = 9,746,375,713.80
  5. Step 5: Solve for x
    x = 9,746,375,713.80/111,238.31
  6. Step 6: Final answer
    x = 87,617.08

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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.