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Finding the Fourth Proportional to 125,270.80, 187,468.80 and 85,904.80

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Solution

The fourth proportional to 125,270.80, 187,468.80 and 85,904.80 is: 128,557.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,270.80 : 187,468.80 = 85,904.80 : x
  2. Step 2: Convert to fraction form
    125,270.80/187,468.80 = 85,904.80/x
  3. Step 3: Cross multiply
    125,270.80x = 187,468.80 × 85,904.80
  4. Step 4: Simplify right side
    125,270.80x = 16,104,469,770.24
  5. Step 5: Solve for x
    x = 16,104,469,770.24/125,270.80
  6. Step 6: Final answer
    x = 128,557.25

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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.