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Finding the Fourth Proportional to 138,454.29, 208,114.95 and 91,371.94

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Solution

The fourth proportional to 138,454.29, 208,114.95 and 91,371.94 is: 137,344.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,454.29 : 208,114.95 = 91,371.94 : x
  2. Step 2: Convert to fraction form
    138,454.29/208,114.95 = 91,371.94/x
  3. Step 3: Cross multiply
    138,454.29x = 208,114.95 × 91,371.94
  4. Step 4: Simplify right side
    138,454.29x = 19,015,866,724.50
  5. Step 5: Solve for x
    x = 19,015,866,724.50/138,454.29
  6. Step 6: Final answer
    x = 137,344.01

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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.