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Finding the Fourth Proportional to 71,239.70, 106,859.55 and 67,959.20

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Solution

The fourth proportional to 71,239.70, 106,859.55 and 67,959.20 is: 101,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,239.70 : 106,859.55 = 67,959.20 : x
  2. Step 2: Convert to fraction form
    71,239.70/106,859.55 = 67,959.20/x
  3. Step 3: Cross multiply
    71,239.70x = 106,859.55 × 67,959.20
  4. Step 4: Simplify right side
    71,239.70x = 7,262,089,530.36
  5. Step 5: Solve for x
    x = 7,262,089,530.36/71,239.70
  6. Step 6: Final answer
    x = 101,938.80

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1.5x scale

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.