Home / 78,348.12-117,568.87-28,432.11

Finding the Fourth Proportional to 78,348.12, 117,568.87 and 28,432.11

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Solution

The fourth proportional to 78,348.12, 117,568.87 and 28,432.11 is: 42,665.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,348.12 : 117,568.87 = 28,432.11 : x
  2. Step 2: Convert to fraction form
    78,348.12/117,568.87 = 28,432.11/x
  3. Step 3: Cross multiply
    78,348.12x = 117,568.87 × 28,432.11
  4. Step 4: Simplify right side
    78,348.12x = 3,342,731,044.42
  5. Step 5: Solve for x
    x = 3,342,731,044.42/78,348.12
  6. Step 6: Final answer
    x = 42,665.11

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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.