Home / 78,712.87-118,037.98-28,781.59

Finding the Fourth Proportional to 78,712.87, 118,037.98 and 28,781.59

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Solution

The fourth proportional to 78,712.87, 118,037.98 and 28,781.59 is: 43,160.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,712.87 : 118,037.98 = 28,781.59 : x
  2. Step 2: Convert to fraction form
    78,712.87/118,037.98 = 28,781.59/x
  3. Step 3: Cross multiply
    78,712.87x = 118,037.98 × 28,781.59
  4. Step 4: Simplify right side
    78,712.87x = 3,397,320,744.79
  5. Step 5: Solve for x
    x = 3,397,320,744.79/78,712.87
  6. Step 6: Final answer
    x = 43,160.93

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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.