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Finding the Fourth Proportional to 144,709.80, 217,064.70 and 121,381.80

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Solution

The fourth proportional to 144,709.80, 217,064.70 and 121,381.80 is: 182,072.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,709.80 : 217,064.70 = 121,381.80 : x
  2. Step 2: Convert to fraction form
    144,709.80/217,064.70 = 121,381.80/x
  3. Step 3: Cross multiply
    144,709.80x = 217,064.70 × 121,381.80
  4. Step 4: Simplify right side
    144,709.80x = 26,347,704,002.46
  5. Step 5: Solve for x
    x = 26,347,704,002.46/144,709.80
  6. Step 6: Final answer
    x = 182,072.70

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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.