Home / 78,243.17-117,335.28-28,310.92

Finding the Fourth Proportional to 78,243.17, 117,335.28 and 28,310.92

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Solution

The fourth proportional to 78,243.17, 117,335.28 and 28,310.92 is: 42,455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,243.17 : 117,335.28 = 28,310.92 : x
  2. Step 2: Convert to fraction form
    78,243.17/117,335.28 = 28,310.92/x
  3. Step 3: Cross multiply
    78,243.17x = 117,335.28 × 28,310.92
  4. Step 4: Simplify right side
    78,243.17x = 3,321,869,725.26
  5. Step 5: Solve for x
    x = 3,321,869,725.26/78,243.17
  6. Step 6: Final answer
    x = 42,455.71

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1.5x scale

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.