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Finding the Fourth Proportional to 125,989.20, 188,983.80 and 66,794.40

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Solution

The fourth proportional to 125,989.20, 188,983.80 and 66,794.40 is: 100,191.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,989.20 : 188,983.80 = 66,794.40 : x
  2. Step 2: Convert to fraction form
    125,989.20/188,983.80 = 66,794.40/x
  3. Step 3: Cross multiply
    125,989.20x = 188,983.80 × 66,794.40
  4. Step 4: Simplify right side
    125,989.20x = 12,623,059,530.72
  5. Step 5: Solve for x
    x = 12,623,059,530.72/125,989.20
  6. Step 6: Final answer
    x = 100,191.60

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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.