Home / 102,873.08-142,045.38-78,961.88

Finding the Fourth Proportional to 102,873.08, 142,045.38 and 78,961.88

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Solution

The fourth proportional to 102,873.08, 142,045.38 and 78,961.88 is: 109,029.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,873.08 : 142,045.38 = 78,961.88 : x
  2. Step 2: Convert to fraction form
    102,873.08/142,045.38 = 78,961.88/x
  3. Step 3: Cross multiply
    102,873.08x = 142,045.38 × 78,961.88
  4. Step 4: Simplify right side
    102,873.08x = 11,216,170,250.11
  5. Step 5: Solve for x
    x = 11,216,170,250.11/102,873.08
  6. Step 6: Final answer
    x = 109,029.21

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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.