Home / 78,921.68-118,393.32-36,780.08

Finding the Fourth Proportional to 78,921.68, 118,393.32 and 36,780.08

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Solution

The fourth proportional to 78,921.68, 118,393.32 and 36,780.08 is: 55,175.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,921.68 : 118,393.32 = 36,780.08 : x
  2. Step 2: Convert to fraction form
    78,921.68/118,393.32 = 36,780.08/x
  3. Step 3: Cross multiply
    78,921.68x = 118,393.32 × 36,780.08
  4. Step 4: Simplify right side
    78,921.68x = 4,354,515,781.07
  5. Step 5: Solve for x
    x = 4,354,515,781.07/78,921.68
  6. Step 6: Final answer
    x = 55,175.15

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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.