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Finding the Fourth Proportional to 144,687.80, 216,966.90 and 65,761.40

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Solution

The fourth proportional to 144,687.80, 216,966.90 and 65,761.40 is: 98,612.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,687.80 : 216,966.90 = 65,761.40 : x
  2. Step 2: Convert to fraction form
    144,687.80/216,966.90 = 65,761.40/x
  3. Step 3: Cross multiply
    144,687.80x = 216,966.90 × 65,761.40
  4. Step 4: Simplify right side
    144,687.80x = 14,268,047,097.66
  5. Step 5: Solve for x
    x = 14,268,047,097.66/144,687.80
  6. Step 6: Final answer
    x = 98,612.65

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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.