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Finding the Fourth Proportional to 67,271.84, 100,904 and 20,521.04

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Solution

The fourth proportional to 67,271.84, 100,904 and 20,521.04 is: 30,780.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,271.84 : 100,904 = 20,521.04 : x
  2. Step 2: Convert to fraction form
    67,271.84/100,904 = 20,521.04/x
  3. Step 3: Cross multiply
    67,271.84x = 100,904 × 20,521.04
  4. Step 4: Simplify right side
    67,271.84x = 2,070,655,020.16
  5. Step 5: Solve for x
    x = 2,070,655,020.16/67,271.84
  6. Step 6: Final answer
    x = 30,780.41

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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.