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Finding the Fourth Proportional to 144,643.70, 216,979.81 and 49,861.40

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Solution

The fourth proportional to 144,643.70, 216,979.81 and 49,861.40 is: 74,797.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,643.70 : 216,979.81 = 49,861.40 : x
  2. Step 2: Convert to fraction form
    144,643.70/216,979.81 = 49,861.40/x
  3. Step 3: Cross multiply
    144,643.70x = 216,979.81 × 49,861.40
  4. Step 4: Simplify right side
    144,643.70x = 10,818,917,098.33
  5. Step 5: Solve for x
    x = 10,818,917,098.33/144,643.70
  6. Step 6: Final answer
    x = 74,797.02

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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.