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Finding the Fourth Proportional to 125,416.80, 187,833.60 and 85,759.20

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Solution

The fourth proportional to 125,416.80, 187,833.60 and 85,759.20 is: 128,439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,416.80 : 187,833.60 = 85,759.20 : x
  2. Step 2: Convert to fraction form
    125,416.80/187,833.60 = 85,759.20/x
  3. Step 3: Cross multiply
    125,416.80x = 187,833.60 × 85,759.20
  4. Step 4: Simplify right side
    125,416.80x = 16,108,459,269.12
  5. Step 5: Solve for x
    x = 16,108,459,269.12/125,416.80
  6. Step 6: Final answer
    x = 128,439.41

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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.