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Finding the Fourth Proportional to 71,897.04, 107,679.24 and 69,405.84

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Solution

The fourth proportional to 71,897.04, 107,679.24 and 69,405.84 is: 103,948.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,897.04 : 107,679.24 = 69,405.84 : x
  2. Step 2: Convert to fraction form
    71,897.04/107,679.24 = 69,405.84/x
  3. Step 3: Cross multiply
    71,897.04x = 107,679.24 × 69,405.84
  4. Step 4: Simplify right side
    71,897.04x = 7,473,568,102.76
  5. Step 5: Solve for x
    x = 7,473,568,102.76/71,897.04
  6. Step 6: Final answer
    x = 103,948.20

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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.