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Finding the Fourth Proportional to 63,720.42, 87,930.79 and 35,039.53

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Solution

The fourth proportional to 63,720.42, 87,930.79 and 35,039.53 is: 48,352.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,720.42 : 87,930.79 = 35,039.53 : x
  2. Step 2: Convert to fraction form
    63,720.42/87,930.79 = 35,039.53/x
  3. Step 3: Cross multiply
    63,720.42x = 87,930.79 × 35,039.53
  4. Step 4: Simplify right side
    63,720.42x = 3,081,053,554.13
  5. Step 5: Solve for x
    x = 3,081,053,554.13/63,720.42
  6. Step 6: Final answer
    x = 48,352.69

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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.