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Finding the Fourth Proportional to 75,253.72, 103,613.70 and 63,899.32

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Solution

The fourth proportional to 75,253.72, 103,613.70 and 63,899.32 is: 87,980.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,253.72 : 103,613.70 = 63,899.32 : x
  2. Step 2: Convert to fraction form
    75,253.72/103,613.70 = 63,899.32/x
  3. Step 3: Cross multiply
    75,253.72x = 103,613.70 × 63,899.32
  4. Step 4: Simplify right side
    75,253.72x = 6,620,844,972.68
  5. Step 5: Solve for x
    x = 6,620,844,972.68/75,253.72
  6. Step 6: Final answer
    x = 87,980.30

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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.