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Finding the Fourth Proportional to 71,038.80, 106,615.80 and 68,734.80

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Solution

The fourth proportional to 71,038.80, 106,615.80 and 68,734.80 is: 103,157.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,038.80 : 106,615.80 = 68,734.80 : x
  2. Step 2: Convert to fraction form
    71,038.80/106,615.80 = 68,734.80/x
  3. Step 3: Cross multiply
    71,038.80x = 106,615.80 × 68,734.80
  4. Step 4: Simplify right side
    71,038.80x = 7,328,215,689.84
  5. Step 5: Solve for x
    x = 7,328,215,689.84/71,038.80
  6. Step 6: Final answer
    x = 103,157.93

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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.