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Finding the Fourth Proportional to 220,566.71, 304,328.99 and 129,915.56

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Solution

The fourth proportional to 220,566.71, 304,328.99 and 129,915.56 is: 179,252.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,566.71 : 304,328.99 = 129,915.56 : x
  2. Step 2: Convert to fraction form
    220,566.71/304,328.99 = 129,915.56/x
  3. Step 3: Cross multiply
    220,566.71x = 304,328.99 × 129,915.56
  4. Step 4: Simplify right side
    220,566.71x = 39,537,069,963.23
  5. Step 5: Solve for x
    x = 39,537,069,963.23/220,566.71
  6. Step 6: Final answer
    x = 179,252.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.