Home / 219,434.80-329,123.02-86,279.30

Finding the Fourth Proportional to 219,434.80, 329,123.02 and 86,279.30

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Solution

The fourth proportional to 219,434.80, 329,123.02 and 86,279.30 is: 129,407.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,434.80 : 329,123.02 = 86,279.30 : x
  2. Step 2: Convert to fraction form
    219,434.80/329,123.02 = 86,279.30/x
  3. Step 3: Cross multiply
    219,434.80x = 329,123.02 × 86,279.30
  4. Step 4: Simplify right side
    219,434.80x = 28,396,503,779.49
  5. Step 5: Solve for x
    x = 28,396,503,779.49/219,434.80
  6. Step 6: Final answer
    x = 129,407.48

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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.