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Finding the Fourth Proportional to 159,401.01, 219,974.84 and 87,781.32

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Solution

The fourth proportional to 159,401.01, 219,974.84 and 87,781.32 is: 121,139.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,401.01 : 219,974.84 = 87,781.32 : x
  2. Step 2: Convert to fraction form
    159,401.01/219,974.84 = 87,781.32/x
  3. Step 3: Cross multiply
    159,401.01x = 219,974.84 × 87,781.32
  4. Step 4: Simplify right side
    159,401.01x = 19,309,681,712.26
  5. Step 5: Solve for x
    x = 19,309,681,712.26/159,401.01
  6. Step 6: Final answer
    x = 121,139.01

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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.