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Finding the Fourth Proportional to 159,605.85, 220,257.54 and 87,988.44

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Solution

The fourth proportional to 159,605.85, 220,257.54 and 87,988.44 is: 121,424.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,605.85 : 220,257.54 = 87,988.44 : x
  2. Step 2: Convert to fraction form
    159,605.85/220,257.54 = 87,988.44/x
  3. Step 3: Cross multiply
    159,605.85x = 220,257.54 × 87,988.44
  4. Step 4: Simplify right side
    159,605.85x = 19,380,117,342.84
  5. Step 5: Solve for x
    x = 19,380,117,342.84/159,605.85
  6. Step 6: Final answer
    x = 121,424.86

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1.5x scale

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.