Home / 78,356.57-117,432.18-36,231.30

Finding the Fourth Proportional to 78,356.57, 117,432.18 and 36,231.30

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Solution

The fourth proportional to 78,356.57, 117,432.18 and 36,231.30 is: 54,299.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,356.57 : 117,432.18 = 36,231.30 : x
  2. Step 2: Convert to fraction form
    78,356.57/117,432.18 = 36,231.30/x
  3. Step 3: Cross multiply
    78,356.57x = 117,432.18 × 36,231.30
  4. Step 4: Simplify right side
    78,356.57x = 4,254,720,543.23
  5. Step 5: Solve for x
    x = 4,254,720,543.23/78,356.57
  6. Step 6: Final answer
    x = 54,299.48

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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.