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Finding the Fourth Proportional to 185,713.20, 278,569.80 and 67,388.40

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Solution

The fourth proportional to 185,713.20, 278,569.80 and 67,388.40 is: 101,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,713.20 : 278,569.80 = 67,388.40 : x
  2. Step 2: Convert to fraction form
    185,713.20/278,569.80 = 67,388.40/x
  3. Step 3: Cross multiply
    185,713.20x = 278,569.80 × 67,388.40
  4. Step 4: Simplify right side
    185,713.20x = 18,772,373,110.32
  5. Step 5: Solve for x
    x = 18,772,373,110.32/185,713.20
  6. Step 6: Final answer
    x = 101,082.60

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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.