Home / 81,983.40-122,975.10-71,615.40

Finding the Fourth Proportional to 81,983.40, 122,975.10 and 71,615.40

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Solution

The fourth proportional to 81,983.40, 122,975.10 and 71,615.40 is: 107,423.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,983.40 : 122,975.10 = 71,615.40 : x
  2. Step 2: Convert to fraction form
    81,983.40/122,975.10 = 71,615.40/x
  3. Step 3: Cross multiply
    81,983.40x = 122,975.10 × 71,615.40
  4. Step 4: Simplify right side
    81,983.40x = 8,806,910,976.54
  5. Step 5: Solve for x
    x = 8,806,910,976.54/81,983.40
  6. Step 6: Final answer
    x = 107,423.10

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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.