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Finding the Fourth Proportional to 159,603, 220,252.80 and 87,981.45

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Solution

The fourth proportional to 159,603, 220,252.80 and 87,981.45 is: 121,414.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,603 : 220,252.80 = 87,981.45 : x
  2. Step 2: Convert to fraction form
    159,603/220,252.80 = 87,981.45/x
  3. Step 3: Cross multiply
    159,603x = 220,252.80 × 87,981.45
  4. Step 4: Simplify right side
    159,603x = 19,378,160,710.56
  5. Step 5: Solve for x
    x = 19,378,160,710.56/159,603
  6. Step 6: Final answer
    x = 121,414.76

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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.