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Finding the Fourth Proportional to 125,585.80, 188,087.10 and 85,928.20

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Solution

The fourth proportional to 125,585.80, 188,087.10 and 85,928.20 is: 128,692.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,585.80 : 188,087.10 = 85,928.20 : x
  2. Step 2: Convert to fraction form
    125,585.80/188,087.10 = 85,928.20/x
  3. Step 3: Cross multiply
    125,585.80x = 188,087.10 × 85,928.20
  4. Step 4: Simplify right side
    125,585.80x = 16,161,985,946.22
  5. Step 5: Solve for x
    x = 16,161,985,946.22/125,585.80
  6. Step 6: Final answer
    x = 128,692.78

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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.