Home / 159,031.14-219,374.89-100,781.20

Finding the Fourth Proportional to 159,031.14, 219,374.89 and 100,781.20

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Solution

The fourth proportional to 159,031.14, 219,374.89 and 100,781.20 is: 139,022.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,031.14 : 219,374.89 = 100,781.20 : x
  2. Step 2: Convert to fraction form
    159,031.14/219,374.89 = 100,781.20/x
  3. Step 3: Cross multiply
    159,031.14x = 219,374.89 × 100,781.20
  4. Step 4: Simplify right side
    159,031.14x = 22,108,864,664.07
  5. Step 5: Solve for x
    x = 22,108,864,664.07/159,031.14
  6. Step 6: Final answer
    x = 139,022.24

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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.