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Finding the Fourth Proportional to 75,615.26, 113,247.92 and 72,990.86

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Solution

The fourth proportional to 75,615.26, 113,247.92 and 72,990.86 is: 109,317.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,615.26 : 113,247.92 = 72,990.86 : x
  2. Step 2: Convert to fraction form
    75,615.26/113,247.92 = 72,990.86/x
  3. Step 3: Cross multiply
    75,615.26x = 113,247.92 × 72,990.86
  4. Step 4: Simplify right side
    75,615.26x = 8,266,062,142.82
  5. Step 5: Solve for x
    x = 8,266,062,142.82/75,615.26
  6. Step 6: Final answer
    x = 109,317.39

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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.