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Finding the Fourth Proportional to 91,988.76, 137,867.72 and 39,336.33

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Solution

The fourth proportional to 91,988.76, 137,867.72 and 39,336.33 is: 58,955.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,988.76 : 137,867.72 = 39,336.33 : x
  2. Step 2: Convert to fraction form
    91,988.76/137,867.72 = 39,336.33/x
  3. Step 3: Cross multiply
    91,988.76x = 137,867.72 × 39,336.33
  4. Step 4: Simplify right side
    91,988.76x = 5,423,209,933.59
  5. Step 5: Solve for x
    x = 5,423,209,933.59/91,988.76
  6. Step 6: Final answer
    x = 58,955.14

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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.