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Finding the Fourth Proportional to 69,213.40, 103,820.10 and 67,901.20

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Solution

The fourth proportional to 69,213.40, 103,820.10 and 67,901.20 is: 101,851.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,213.40 : 103,820.10 = 67,901.20 : x
  2. Step 2: Convert to fraction form
    69,213.40/103,820.10 = 67,901.20/x
  3. Step 3: Cross multiply
    69,213.40x = 103,820.10 × 67,901.20
  4. Step 4: Simplify right side
    69,213.40x = 7,049,509,374.12
  5. Step 5: Solve for x
    x = 7,049,509,374.12/69,213.40
  6. Step 6: Final answer
    x = 101,851.80

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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.