Home / 71,970.60-107,955.90-66,721.80

Finding the Fourth Proportional to 71,970.60, 107,955.90 and 66,721.80

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Solution

The fourth proportional to 71,970.60, 107,955.90 and 66,721.80 is: 100,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,970.60 : 107,955.90 = 66,721.80 : x
  2. Step 2: Convert to fraction form
    71,970.60/107,955.90 = 66,721.80/x
  3. Step 3: Cross multiply
    71,970.60x = 107,955.90 × 66,721.80
  4. Step 4: Simplify right side
    71,970.60x = 7,203,011,968.62
  5. Step 5: Solve for x
    x = 7,203,011,968.62/71,970.60
  6. Step 6: Final answer
    x = 100,082.70

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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.