Home / 131,839.50-181,937.40-71,408.72

Finding the Fourth Proportional to 131,839.50, 181,937.40 and 71,408.72

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Solution

The fourth proportional to 131,839.50, 181,937.40 and 71,408.72 is: 98,543.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,839.50 : 181,937.40 = 71,408.72 : x
  2. Step 2: Convert to fraction form
    131,839.50/181,937.40 = 71,408.72/x
  3. Step 3: Cross multiply
    131,839.50x = 181,937.40 × 71,408.72
  4. Step 4: Simplify right side
    131,839.50x = 12,991,916,854.13
  5. Step 5: Solve for x
    x = 12,991,916,854.13/131,839.50
  6. Step 6: Final answer
    x = 98,543.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.