Home / 78,781.08-118,116.25-28,854.69

Finding the Fourth Proportional to 78,781.08, 118,116.25 and 28,854.69

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Solution

The fourth proportional to 78,781.08, 118,116.25 and 28,854.69 is: 43,261.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,781.08 : 118,116.25 = 28,854.69 : x
  2. Step 2: Convert to fraction form
    78,781.08/118,116.25 = 28,854.69/x
  3. Step 3: Cross multiply
    78,781.08x = 118,116.25 × 28,854.69
  4. Step 4: Simplify right side
    78,781.08x = 3,408,207,777.71
  5. Step 5: Solve for x
    x = 3,408,207,777.71/78,781.08
  6. Step 6: Final answer
    x = 43,261.75

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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.