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Finding the Fourth Proportional to 82,911.20, 124,366.80 and 70,080.80

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Solution

The fourth proportional to 82,911.20, 124,366.80 and 70,080.80 is: 105,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,911.20 : 124,366.80 = 70,080.80 : x
  2. Step 2: Convert to fraction form
    82,911.20/124,366.80 = 70,080.80/x
  3. Step 3: Cross multiply
    82,911.20x = 124,366.80 × 70,080.80
  4. Step 4: Simplify right side
    82,911.20x = 8,715,724,837.44
  5. Step 5: Solve for x
    x = 8,715,724,837.44/82,911.20
  6. Step 6: Final answer
    x = 105,121.20

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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.