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Finding the Fourth Proportional to 42,850.80, 64,276.20 and 42,121.80

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Solution

The fourth proportional to 42,850.80, 64,276.20 and 42,121.80 is: 63,182.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,850.80 : 64,276.20 = 42,121.80 : x
  2. Step 2: Convert to fraction form
    42,850.80/64,276.20 = 42,121.80/x
  3. Step 3: Cross multiply
    42,850.80x = 64,276.20 × 42,121.80
  4. Step 4: Simplify right side
    42,850.80x = 2,707,429,241.16
  5. Step 5: Solve for x
    x = 2,707,429,241.16/42,850.80
  6. Step 6: Final answer
    x = 63,182.70

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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.