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Finding the Fourth Proportional to 220,569.69, 330,963.95 and 87,447

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Solution

The fourth proportional to 220,569.69, 330,963.95 and 87,447 is: 131,213.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,569.69 : 330,963.95 = 87,447 : x
  2. Step 2: Convert to fraction form
    220,569.69/330,963.95 = 87,447/x
  3. Step 3: Cross multiply
    220,569.69x = 330,963.95 × 87,447
  4. Step 4: Simplify right side
    220,569.69x = 28,941,804,535.65
  5. Step 5: Solve for x
    x = 28,941,804,535.65/220,569.69
  6. Step 6: Final answer
    x = 131,213.88

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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.