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Finding the Fourth Proportional to 144,815.40, 217,223.10 and 121,487.40

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Solution

The fourth proportional to 144,815.40, 217,223.10 and 121,487.40 is: 182,231.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,815.40 : 217,223.10 = 121,487.40 : x
  2. Step 2: Convert to fraction form
    144,815.40/217,223.10 = 121,487.40/x
  3. Step 3: Cross multiply
    144,815.40x = 217,223.10 × 121,487.40
  4. Step 4: Simplify right side
    144,815.40x = 26,389,869,638.94
  5. Step 5: Solve for x
    x = 26,389,869,638.94/144,815.40
  6. Step 6: Final answer
    x = 182,231.10

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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.