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Finding the Fourth Proportional to 125,892.80, 189,057.90 and 66,843.80

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Solution

The fourth proportional to 125,892.80, 189,057.90 and 66,843.80 is: 100,381.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,892.80 : 189,057.90 = 66,843.80 : x
  2. Step 2: Convert to fraction form
    125,892.80/189,057.90 = 66,843.80/x
  3. Step 3: Cross multiply
    125,892.80x = 189,057.90 × 66,843.80
  4. Step 4: Simplify right side
    125,892.80x = 12,637,348,456.02
  5. Step 5: Solve for x
    x = 12,637,348,456.02/125,892.80
  6. Step 6: Final answer
    x = 100,381.82

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1.5x scale

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.