Home / 113,878.08-157,121.92-78,079.04

Finding the Fourth Proportional to 113,878.08, 157,121.92 and 78,079.04

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Solution

The fourth proportional to 113,878.08, 157,121.92 and 78,079.04 is: 107,728.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,878.08 : 157,121.92 = 78,079.04 : x
  2. Step 2: Convert to fraction form
    113,878.08/157,121.92 = 78,079.04/x
  3. Step 3: Cross multiply
    113,878.08x = 157,121.92 × 78,079.04
  4. Step 4: Simplify right side
    113,878.08x = 12,267,928,676.56
  5. Step 5: Solve for x
    x = 12,267,928,676.56/113,878.08
  6. Step 6: Final answer
    x = 107,728.62

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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.