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Finding the Fourth Proportional to 159,959.62, 240,087.03 and 81,129.21

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Solution

The fourth proportional to 159,959.62, 240,087.03 and 81,129.21 is: 121,768.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,959.62 : 240,087.03 = 81,129.21 : x
  2. Step 2: Convert to fraction form
    159,959.62/240,087.03 = 81,129.21/x
  3. Step 3: Cross multiply
    159,959.62x = 240,087.03 × 81,129.21
  4. Step 4: Simplify right side
    159,959.62x = 19,478,069,874.71
  5. Step 5: Solve for x
    x = 19,478,069,874.71/159,959.62
  6. Step 6: Final answer
    x = 121,768.67

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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.