Home / 91,579.14-126,309.78-78,854.04

Finding the Fourth Proportional to 91,579.14, 126,309.78 and 78,854.04

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Solution

The fourth proportional to 91,579.14, 126,309.78 and 78,854.04 is: 108,758.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,579.14 : 126,309.78 = 78,854.04 : x
  2. Step 2: Convert to fraction form
    91,579.14/126,309.78 = 78,854.04/x
  3. Step 3: Cross multiply
    91,579.14x = 126,309.78 × 78,854.04
  4. Step 4: Simplify right side
    91,579.14x = 9,960,036,444.51
  5. Step 5: Solve for x
    x = 9,960,036,444.51/91,579.14
  6. Step 6: Final answer
    x = 108,758.79

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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.