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Finding the Fourth Proportional to 144,955.30, 217,432.95 and 91,811.20

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Solution

The fourth proportional to 144,955.30, 217,432.95 and 91,811.20 is: 137,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,955.30 : 217,432.95 = 91,811.20 : x
  2. Step 2: Convert to fraction form
    144,955.30/217,432.95 = 91,811.20/x
  3. Step 3: Cross multiply
    144,955.30x = 217,432.95 × 91,811.20
  4. Step 4: Simplify right side
    144,955.30x = 19,962,780,059.04
  5. Step 5: Solve for x
    x = 19,962,780,059.04/144,955.30
  6. Step 6: Final answer
    x = 137,716.80

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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.