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Finding the Fourth Proportional to 63,212.80, 87,230.16 and 39,338.72

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Solution

The fourth proportional to 63,212.80, 87,230.16 and 39,338.72 is: 54,285.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,212.80 : 87,230.16 = 39,338.72 : x
  2. Step 2: Convert to fraction form
    63,212.80/87,230.16 = 39,338.72/x
  3. Step 3: Cross multiply
    63,212.80x = 87,230.16 × 39,338.72
  4. Step 4: Simplify right side
    63,212.80x = 3,431,522,839.80
  5. Step 5: Solve for x
    x = 3,431,522,839.80/63,212.80
  6. Step 6: Final answer
    x = 54,285.25

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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.