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Finding the Fourth Proportional to 42,691.20, 63,921.60 and 42,691.20

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Solution

The fourth proportional to 42,691.20, 63,921.60 and 42,691.20 is: 63,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,691.20 : 63,921.60 = 42,691.20 : x
  2. Step 2: Convert to fraction form
    42,691.20/63,921.60 = 42,691.20/x
  3. Step 3: Cross multiply
    42,691.20x = 63,921.60 × 42,691.20
  4. Step 4: Simplify right side
    42,691.20x = 2,728,889,809.92
  5. Step 5: Solve for x
    x = 2,728,889,809.92/42,691.20
  6. Step 6: Final answer
    x = 63,921.60

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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.