Home / 84,521.60-126,782.40-51,279.20

Finding the Fourth Proportional to 84,521.60, 126,782.40 and 51,279.20

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Solution

The fourth proportional to 84,521.60, 126,782.40 and 51,279.20 is: 76,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,521.60 : 126,782.40 = 51,279.20 : x
  2. Step 2: Convert to fraction form
    84,521.60/126,782.40 = 51,279.20/x
  3. Step 3: Cross multiply
    84,521.60x = 126,782.40 × 51,279.20
  4. Step 4: Simplify right side
    84,521.60x = 6,501,300,046.08
  5. Step 5: Solve for x
    x = 6,501,300,046.08/84,521.60
  6. Step 6: Final answer
    x = 76,918.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.