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Finding the Fourth Proportional to 69,315.40, 103,973.10 and 68,732.20

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Solution

The fourth proportional to 69,315.40, 103,973.10 and 68,732.20 is: 103,098.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,315.40 : 103,973.10 = 68,732.20 : x
  2. Step 2: Convert to fraction form
    69,315.40/103,973.10 = 68,732.20/x
  3. Step 3: Cross multiply
    69,315.40x = 103,973.10 × 68,732.20
  4. Step 4: Simplify right side
    69,315.40x = 7,146,299,903.82
  5. Step 5: Solve for x
    x = 7,146,299,903.82/69,315.40
  6. Step 6: Final answer
    x = 103,098.30

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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.