Home / 90,129.70-124,377.42-54,339.31

Finding the Fourth Proportional to 90,129.70, 124,377.42 and 54,339.31

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Solution

The fourth proportional to 90,129.70, 124,377.42 and 54,339.31 is: 74,987.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,129.70 : 124,377.42 = 54,339.31 : x
  2. Step 2: Convert to fraction form
    90,129.70/124,377.42 = 54,339.31/x
  3. Step 3: Cross multiply
    90,129.70x = 124,377.42 × 54,339.31
  4. Step 4: Simplify right side
    90,129.70x = 6,758,583,182.38
  5. Step 5: Solve for x
    x = 6,758,583,182.38/90,129.70
  6. Step 6: Final answer
    x = 74,987.30

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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.