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Finding the Fourth Proportional to 272,347.64, 408,521.49 and 72,668.76

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Solution

The fourth proportional to 272,347.64, 408,521.49 and 72,668.76 is: 109,003.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,347.64 : 408,521.49 = 72,668.76 : x
  2. Step 2: Convert to fraction form
    272,347.64/408,521.49 = 72,668.76/x
  3. Step 3: Cross multiply
    272,347.64x = 408,521.49 × 72,668.76
  4. Step 4: Simplify right side
    272,347.64x = 29,686,750,111.65
  5. Step 5: Solve for x
    x = 29,686,750,111.65/272,347.64
  6. Step 6: Final answer
    x = 109,003.15

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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.