Home / 78,841.12-118,277.25-28,921.68

Finding the Fourth Proportional to 78,841.12, 118,277.25 and 28,921.68

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Solution

The fourth proportional to 78,841.12, 118,277.25 and 28,921.68 is: 43,388.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,841.12 : 118,277.25 = 28,921.68 : x
  2. Step 2: Convert to fraction form
    78,841.12/118,277.25 = 28,921.68/x
  3. Step 3: Cross multiply
    78,841.12x = 118,277.25 × 28,921.68
  4. Step 4: Simplify right side
    78,841.12x = 3,420,776,184.39
  5. Step 5: Solve for x
    x = 3,420,776,184.39/78,841.12
  6. Step 6: Final answer
    x = 43,388.22

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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.