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Finding the Fourth Proportional to 84,263.65, 126,023.68 and 74,968.90

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Solution

The fourth proportional to 84,263.65, 126,023.68 and 74,968.90 is: 112,122.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,263.65 : 126,023.68 = 74,968.90 : x
  2. Step 2: Convert to fraction form
    84,263.65/126,023.68 = 74,968.90/x
  3. Step 3: Cross multiply
    84,263.65x = 126,023.68 × 74,968.90
  4. Step 4: Simplify right side
    84,263.65x = 9,447,856,663.55
  5. Step 5: Solve for x
    x = 9,447,856,663.55/84,263.65
  6. Step 6: Final answer
    x = 112,122.57

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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.