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Finding the Fourth Proportional to 219,848.80, 329,629.20 and 86,648.80

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Solution

The fourth proportional to 219,848.80, 329,629.20 and 86,648.80 is: 129,916.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,848.80 : 329,629.20 = 86,648.80 : x
  2. Step 2: Convert to fraction form
    219,848.80/329,629.20 = 86,648.80/x
  3. Step 3: Cross multiply
    219,848.80x = 329,629.20 × 86,648.80
  4. Step 4: Simplify right side
    219,848.80x = 28,561,974,624.96
  5. Step 5: Solve for x
    x = 28,561,974,624.96/219,848.80
  6. Step 6: Final answer
    x = 129,916.45

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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.