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Finding the Fourth Proportional to 144,248.31, 199,061.55 and 79,721.89

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Solution

The fourth proportional to 144,248.31, 199,061.55 and 79,721.89 is: 110,015.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,248.31 : 199,061.55 = 79,721.89 : x
  2. Step 2: Convert to fraction form
    144,248.31/199,061.55 = 79,721.89/x
  3. Step 3: Cross multiply
    144,248.31x = 199,061.55 × 79,721.89
  4. Step 4: Simplify right side
    144,248.31x = 15,869,562,494.68
  5. Step 5: Solve for x
    x = 15,869,562,494.68/144,248.31
  6. Step 6: Final answer
    x = 110,015.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.