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Finding the Fourth Proportional to 135,773.89, 187,373.87 and 90,378.81

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Solution

The fourth proportional to 135,773.89, 187,373.87 and 90,378.81 is: 124,726.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,773.89 : 187,373.87 = 90,378.81 : x
  2. Step 2: Convert to fraction form
    135,773.89/187,373.87 = 90,378.81/x
  3. Step 3: Cross multiply
    135,773.89x = 187,373.87 × 90,378.81
  4. Step 4: Simplify right side
    135,773.89x = 16,934,626,943.80
  5. Step 5: Solve for x
    x = 16,934,626,943.80/135,773.89
  6. Step 6: Final answer
    x = 124,726.68

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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.