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Finding the Fourth Proportional to 78,691.64, 108,567.79 and 48,053.56

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Solution

The fourth proportional to 78,691.64, 108,567.79 and 48,053.56 is: 66,297.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691.64 : 108,567.79 = 48,053.56 : x
  2. Step 2: Convert to fraction form
    78,691.64/108,567.79 = 48,053.56/x
  3. Step 3: Cross multiply
    78,691.64x = 108,567.79 × 48,053.56
  4. Step 4: Simplify right side
    78,691.64x = 5,217,068,810.83
  5. Step 5: Solve for x
    x = 5,217,068,810.83/78,691.64
  6. Step 6: Final answer
    x = 66,297.62

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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.