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Finding the Fourth Proportional to 91,959.81, 137,936.95 and 25,403.92

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Solution

The fourth proportional to 91,959.81, 137,936.95 and 25,403.92 is: 38,105.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,959.81 : 137,936.95 = 25,403.92 : x
  2. Step 2: Convert to fraction form
    91,959.81/137,936.95 = 25,403.92/x
  3. Step 3: Cross multiply
    91,959.81x = 137,936.95 × 25,403.92
  4. Step 4: Simplify right side
    91,959.81x = 3,504,139,242.84
  5. Step 5: Solve for x
    x = 3,504,139,242.84/91,959.81
  6. Step 6: Final answer
    x = 38,105.12

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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.