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Finding the Fourth Proportional to 144,939.20, 217,419.60 and 51,432.80

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Solution

The fourth proportional to 144,939.20, 217,419.60 and 51,432.80 is: 77,153.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,939.20 : 217,419.60 = 51,432.80 : x
  2. Step 2: Convert to fraction form
    144,939.20/217,419.60 = 51,432.80/x
  3. Step 3: Cross multiply
    144,939.20x = 217,419.60 × 51,432.80
  4. Step 4: Simplify right side
    144,939.20x = 11,182,498,802.88
  5. Step 5: Solve for x
    x = 11,182,498,802.88/144,939.20
  6. Step 6: Final answer
    x = 77,153.03

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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.