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Finding the Fourth Proportional to 159,486.60, 220,091.72 and 86,889.14

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Solution

The fourth proportional to 159,486.60, 220,091.72 and 86,889.14 is: 119,907.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,486.60 : 220,091.72 = 86,889.14 : x
  2. Step 2: Convert to fraction form
    159,486.60/220,091.72 = 86,889.14/x
  3. Step 3: Cross multiply
    159,486.60x = 220,091.72 × 86,889.14
  4. Step 4: Simplify right side
    159,486.60x = 19,123,578,737.02
  5. Step 5: Solve for x
    x = 19,123,578,737.02/159,486.60
  6. Step 6: Final answer
    x = 119,907.12

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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.