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Finding the Fourth Proportional to 159,721.29, 220,301.51 and 111,985.29

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Solution

The fourth proportional to 159,721.29, 220,301.51 and 111,985.29 is: 154,459.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,721.29 : 220,301.51 = 111,985.29 : x
  2. Step 2: Convert to fraction form
    159,721.29/220,301.51 = 111,985.29/x
  3. Step 3: Cross multiply
    159,721.29x = 220,301.51 × 111,985.29
  4. Step 4: Simplify right side
    159,721.29x = 24,670,527,924.86
  5. Step 5: Solve for x
    x = 24,670,527,924.86/159,721.29
  6. Step 6: Final answer
    x = 154,459.86

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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.