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Finding the Fourth Proportional to 159,603.12, 220,252.97 and 87,981.57

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Solution

The fourth proportional to 159,603.12, 220,252.97 and 87,981.57 is: 121,414.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,603.12 : 220,252.97 = 87,981.57 : x
  2. Step 2: Convert to fraction form
    159,603.12/220,252.97 = 87,981.57/x
  3. Step 3: Cross multiply
    159,603.12x = 220,252.97 × 87,981.57
  4. Step 4: Simplify right side
    159,603.12x = 19,378,202,317.72
  5. Step 5: Solve for x
    x = 19,378,202,317.72/159,603.12
  6. Step 6: Final answer
    x = 121,414.93

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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.