Home / 78,542.64-108,385.63-42,732.69

Finding the Fourth Proportional to 78,542.64, 108,385.63 and 42,732.69

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Solution

The fourth proportional to 78,542.64, 108,385.63 and 42,732.69 is: 58,969.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,542.64 : 108,385.63 = 42,732.69 : x
  2. Step 2: Convert to fraction form
    78,542.64/108,385.63 = 42,732.69/x
  3. Step 3: Cross multiply
    78,542.64x = 108,385.63 × 42,732.69
  4. Step 4: Simplify right side
    78,542.64x = 4,631,609,013.97
  5. Step 5: Solve for x
    x = 4,631,609,013.97/78,542.64
  6. Step 6: Final answer
    x = 58,969.36

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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.