Home / 78,451.43-108,265.09-42,643.86

Finding the Fourth Proportional to 78,451.43, 108,265.09 and 42,643.86

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Solution

The fourth proportional to 78,451.43, 108,265.09 and 42,643.86 is: 58,849.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,451.43 : 108,265.09 = 42,643.86 : x
  2. Step 2: Convert to fraction form
    78,451.43/108,265.09 = 42,643.86/x
  3. Step 3: Cross multiply
    78,451.43x = 108,265.09 × 42,643.86
  4. Step 4: Simplify right side
    78,451.43x = 4,616,841,340.85
  5. Step 5: Solve for x
    x = 4,616,841,340.85/78,451.43
  6. Step 6: Final answer
    x = 58,849.68

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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.