Home / 100,305.80-138,436.74-57,856.04

Finding the Fourth Proportional to 100,305.80, 138,436.74 and 57,856.04

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Solution

The fourth proportional to 100,305.80, 138,436.74 and 57,856.04 is: 79,849.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,305.80 : 138,436.74 = 57,856.04 : x
  2. Step 2: Convert to fraction form
    100,305.80/138,436.74 = 57,856.04/x
  3. Step 3: Cross multiply
    100,305.80x = 138,436.74 × 57,856.04
  4. Step 4: Simplify right side
    100,305.80x = 8,009,401,566.91
  5. Step 5: Solve for x
    x = 8,009,401,566.91/100,305.80
  6. Step 6: Final answer
    x = 79,849.83

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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.