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Finding the Fourth Proportional to 84,310.80, 126,466.20 and 42,320.40

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Solution

The fourth proportional to 84,310.80, 126,466.20 and 42,320.40 is: 63,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,310.80 : 126,466.20 = 42,320.40 : x
  2. Step 2: Convert to fraction form
    84,310.80/126,466.20 = 42,320.40/x
  3. Step 3: Cross multiply
    84,310.80x = 126,466.20 × 42,320.40
  4. Step 4: Simplify right side
    84,310.80x = 5,352,100,170.48
  5. Step 5: Solve for x
    x = 5,352,100,170.48/84,310.80
  6. Step 6: Final answer
    x = 63,480.60

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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.