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Finding the Fourth Proportional to 159,407.01, 219,983.13 and 87,787.32

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Solution

The fourth proportional to 159,407.01, 219,983.13 and 87,787.32 is: 121,147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,407.01 : 219,983.13 = 87,787.32 : x
  2. Step 2: Convert to fraction form
    159,407.01/219,983.13 = 87,787.32/x
  3. Step 3: Cross multiply
    159,407.01x = 219,983.13 × 87,787.32
  4. Step 4: Simplify right side
    159,407.01x = 19,311,729,427.91
  5. Step 5: Solve for x
    x = 19,311,729,427.91/159,407.01
  6. Step 6: Final answer
    x = 121,147.30

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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.