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Finding the Fourth Proportional to 113,558.40, 170,363.20 and 66,787.20

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Solution

The fourth proportional to 113,558.40, 170,363.20 and 66,787.20 is: 100,195.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,558.40 : 170,363.20 = 66,787.20 : x
  2. Step 2: Convert to fraction form
    113,558.40/170,363.20 = 66,787.20/x
  3. Step 3: Cross multiply
    113,558.40x = 170,363.20 × 66,787.20
  4. Step 4: Simplify right side
    113,558.40x = 11,378,081,111.04
  5. Step 5: Solve for x
    x = 11,378,081,111.04/113,558.40
  6. Step 6: Final answer
    x = 100,195.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.