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Finding the Fourth Proportional to 84,040.80, 126,061.20 and 76,264.80

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Solution

The fourth proportional to 84,040.80, 126,061.20 and 76,264.80 is: 114,397.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,040.80 : 126,061.20 = 76,264.80 : x
  2. Step 2: Convert to fraction form
    84,040.80/126,061.20 = 76,264.80/x
  3. Step 3: Cross multiply
    84,040.80x = 126,061.20 × 76,264.80
  4. Step 4: Simplify right side
    84,040.80x = 9,614,032,205.76
  5. Step 5: Solve for x
    x = 9,614,032,205.76/84,040.80
  6. Step 6: Final answer
    x = 114,397.20

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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.