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Finding the Fourth Proportional to 78,168.60, 107,921.58 and 60,229.56

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Solution

The fourth proportional to 78,168.60, 107,921.58 and 60,229.56 is: 83,154.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,168.60 : 107,921.58 = 60,229.56 : x
  2. Step 2: Convert to fraction form
    78,168.60/107,921.58 = 60,229.56/x
  3. Step 3: Cross multiply
    78,168.60x = 107,921.58 × 60,229.56
  4. Step 4: Simplify right side
    78,168.60x = 6,500,069,277.90
  5. Step 5: Solve for x
    x = 6,500,069,277.90/78,168.60
  6. Step 6: Final answer
    x = 83,154.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.