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Finding the Fourth Proportional to 91,989.01, 137,868.09 and 39,336.58

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Solution

The fourth proportional to 91,989.01, 137,868.09 and 39,336.58 is: 58,955.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,989.01 : 137,868.09 = 39,336.58 : x
  2. Step 2: Convert to fraction form
    91,989.01/137,868.09 = 39,336.58/x
  3. Step 3: Cross multiply
    91,989.01x = 137,868.09 × 39,336.58
  4. Step 4: Simplify right side
    91,989.01x = 5,423,259,151.73
  5. Step 5: Solve for x
    x = 5,423,259,151.73/91,989.01
  6. Step 6: Final answer
    x = 58,955.51

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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.