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Finding the Fourth Proportional to 137,573.48, 189,767.12 and 91,005.78

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Solution

The fourth proportional to 137,573.48, 189,767.12 and 91,005.78 is: 125,532.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,573.48 : 189,767.12 = 91,005.78 : x
  2. Step 2: Convert to fraction form
    137,573.48/189,767.12 = 91,005.78/x
  3. Step 3: Cross multiply
    137,573.48x = 189,767.12 × 91,005.78
  4. Step 4: Simplify right side
    137,573.48x = 17,269,904,773.95
  5. Step 5: Solve for x
    x = 17,269,904,773.95/137,573.48
  6. Step 6: Final answer
    x = 125,532.22

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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.