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Finding the Fourth Proportional to 78,295.68, 117,505.08 and 36,195.12

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Solution

The fourth proportional to 78,295.68, 117,505.08 and 36,195.12 is: 54,321.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,295.68 : 117,505.08 = 36,195.12 : x
  2. Step 2: Convert to fraction form
    78,295.68/117,505.08 = 36,195.12/x
  3. Step 3: Cross multiply
    78,295.68x = 117,505.08 × 36,195.12
  4. Step 4: Simplify right side
    78,295.68x = 4,253,110,471.21
  5. Step 5: Solve for x
    x = 4,253,110,471.21/78,295.68
  6. Step 6: Final answer
    x = 54,321.14

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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.