Home / 219,845.20-329,767.80-86,681.20

Finding the Fourth Proportional to 219,845.20, 329,767.80 and 86,681.20

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Solution

The fourth proportional to 219,845.20, 329,767.80 and 86,681.20 is: 130,021.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,845.20 : 329,767.80 = 86,681.20 : x
  2. Step 2: Convert to fraction form
    219,845.20/329,767.80 = 86,681.20/x
  3. Step 3: Cross multiply
    219,845.20x = 329,767.80 × 86,681.20
  4. Step 4: Simplify right side
    219,845.20x = 28,584,668,625.36
  5. Step 5: Solve for x
    x = 28,584,668,625.36/219,845.20
  6. Step 6: Final answer
    x = 130,021.80

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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.