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Finding the Fourth Proportional to 125,188.11, 187,905.20 and 91,813.13

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Solution

The fourth proportional to 125,188.11, 187,905.20 and 91,813.13 is: 137,809.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,188.11 : 187,905.20 = 91,813.13 : x
  2. Step 2: Convert to fraction form
    125,188.11/187,905.20 = 91,813.13/x
  3. Step 3: Cross multiply
    125,188.11x = 187,905.20 × 91,813.13
  4. Step 4: Simplify right side
    125,188.11x = 17,252,163,156.68
  5. Step 5: Solve for x
    x = 17,252,163,156.68/125,188.11
  6. Step 6: Final answer
    x = 137,809.92

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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.