Home / 78,821.60-118,232.40-49,272.80

Finding the Fourth Proportional to 78,821.60, 118,232.40 and 49,272.80

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Solution

The fourth proportional to 78,821.60, 118,232.40 and 49,272.80 is: 73,909.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821.60 : 118,232.40 = 49,272.80 : x
  2. Step 2: Convert to fraction form
    78,821.60/118,232.40 = 49,272.80/x
  3. Step 3: Cross multiply
    78,821.60x = 118,232.40 × 49,272.80
  4. Step 4: Simplify right side
    78,821.60x = 5,825,641,398.72
  5. Step 5: Solve for x
    x = 5,825,641,398.72/78,821.60
  6. Step 6: Final answer
    x = 73,909.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.