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Finding the Fourth Proportional to 144,881.20, 217,429.80 and 74,724.40

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Solution

The fourth proportional to 144,881.20, 217,429.80 and 74,724.40 is: 112,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,881.20 : 217,429.80 = 74,724.40 : x
  2. Step 2: Convert to fraction form
    144,881.20/217,429.80 = 74,724.40/x
  3. Step 3: Cross multiply
    144,881.20x = 217,429.80 × 74,724.40
  4. Step 4: Simplify right side
    144,881.20x = 16,247,311,347.12
  5. Step 5: Solve for x
    x = 16,247,311,347.12/144,881.20
  6. Step 6: Final answer
    x = 112,142.30

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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.