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Finding the Fourth Proportional to 84,610.80, 126,916.20 and 79,426.80

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Solution

The fourth proportional to 84,610.80, 126,916.20 and 79,426.80 is: 119,140.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,610.80 : 126,916.20 = 79,426.80 : x
  2. Step 2: Convert to fraction form
    84,610.80/126,916.20 = 79,426.80/x
  3. Step 3: Cross multiply
    84,610.80x = 126,916.20 × 79,426.80
  4. Step 4: Simplify right side
    84,610.80x = 10,080,547,634.16
  5. Step 5: Solve for x
    x = 10,080,547,634.16/84,610.80
  6. Step 6: Final answer
    x = 119,140.20

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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.