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Finding the Fourth Proportional to 69,040.80, 103,407.84 and 67,364.64

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Solution

The fourth proportional to 69,040.80, 103,407.84 and 67,364.64 is: 100,897.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,040.80 : 103,407.84 = 67,364.64 : x
  2. Step 2: Convert to fraction form
    69,040.80/103,407.84 = 67,364.64/x
  3. Step 3: Cross multiply
    69,040.80x = 103,407.84 × 67,364.64
  4. Step 4: Simplify right side
    69,040.80x = 6,966,031,914.78
  5. Step 5: Solve for x
    x = 6,966,031,914.78/69,040.80
  6. Step 6: Final answer
    x = 100,897.32

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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.