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Finding the Fourth Proportional to 91,881.40, 137,822.10 and 54,556.60

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Solution

The fourth proportional to 91,881.40, 137,822.10 and 54,556.60 is: 81,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,881.40 : 137,822.10 = 54,556.60 : x
  2. Step 2: Convert to fraction form
    91,881.40/137,822.10 = 54,556.60/x
  3. Step 3: Cross multiply
    91,881.40x = 137,822.10 × 54,556.60
  4. Step 4: Simplify right side
    91,881.40x = 7,519,105,180.86
  5. Step 5: Solve for x
    x = 7,519,105,180.86/91,881.40
  6. Step 6: Final answer
    x = 81,834.90

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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.