Home / 78,439.90-108,247.91-42,629.92

Finding the Fourth Proportional to 78,439.90, 108,247.91 and 42,629.92

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Solution

The fourth proportional to 78,439.90, 108,247.91 and 42,629.92 is: 58,829.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.90 : 108,247.91 = 42,629.92 : x
  2. Step 2: Convert to fraction form
    78,439.90/108,247.91 = 42,629.92/x
  3. Step 3: Cross multiply
    78,439.90x = 108,247.91 × 42,629.92
  4. Step 4: Simplify right side
    78,439.90x = 4,614,599,259.70
  5. Step 5: Solve for x
    x = 4,614,599,259.70/78,439.90
  6. Step 6: Final answer
    x = 58,829.74

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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.