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Finding the Fourth Proportional to 78,591.51, 108,463.86 and 48,394.53

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Solution

The fourth proportional to 78,591.51, 108,463.86 and 48,394.53 is: 66,789.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,591.51 : 108,463.86 = 48,394.53 : x
  2. Step 2: Convert to fraction form
    78,591.51/108,463.86 = 48,394.53/x
  3. Step 3: Cross multiply
    78,591.51x = 108,463.86 × 48,394.53
  4. Step 4: Simplify right side
    78,591.51x = 5,249,057,526.69
  5. Step 5: Solve for x
    x = 5,249,057,526.69/78,591.51
  6. Step 6: Final answer
    x = 66,789.12

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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.