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Finding the Fourth Proportional to 78,519.57, 117,507.15 and 75,253.65

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Solution

The fourth proportional to 78,519.57, 117,507.15 and 75,253.65 is: 112,619.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519.57 : 117,507.15 = 75,253.65 : x
  2. Step 2: Convert to fraction form
    78,519.57/117,507.15 = 75,253.65/x
  3. Step 3: Cross multiply
    78,519.57x = 117,507.15 × 75,253.65
  4. Step 4: Simplify right side
    78,519.57x = 8,842,841,938.60
  5. Step 5: Solve for x
    x = 8,842,841,938.60/78,519.57
  6. Step 6: Final answer
    x = 112,619.59

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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.