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Finding the Fourth Proportional to 90,545.88, 135,831.21 and 34,391.89

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Solution

The fourth proportional to 90,545.88, 135,831.21 and 34,391.89 is: 51,592.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,545.88 : 135,831.21 = 34,391.89 : x
  2. Step 2: Convert to fraction form
    90,545.88/135,831.21 = 34,391.89/x
  3. Step 3: Cross multiply
    90,545.88x = 135,831.21 × 34,391.89
  4. Step 4: Simplify right side
    90,545.88x = 4,671,491,181.77
  5. Step 5: Solve for x
    x = 4,671,491,181.77/90,545.88
  6. Step 6: Final answer
    x = 51,592.53

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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.