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Finding the Fourth Proportional to 159,911.23, 220,673.91 and 87,311.74

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Solution

The fourth proportional to 159,911.23, 220,673.91 and 87,311.74 is: 120,488.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,911.23 : 220,673.91 = 87,311.74 : x
  2. Step 2: Convert to fraction form
    159,911.23/220,673.91 = 87,311.74/x
  3. Step 3: Cross multiply
    159,911.23x = 220,673.91 × 87,311.74
  4. Step 4: Simplify right side
    159,911.23x = 19,267,423,054.70
  5. Step 5: Solve for x
    x = 19,267,423,054.70/159,911.23
  6. Step 6: Final answer
    x = 120,488.24

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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.