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Finding the Fourth Proportional to 84,356.40, 126,680.40 and 54,904.80

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Solution

The fourth proportional to 84,356.40, 126,680.40 and 54,904.80 is: 82,452.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,356.40 : 126,680.40 = 54,904.80 : x
  2. Step 2: Convert to fraction form
    84,356.40/126,680.40 = 54,904.80/x
  3. Step 3: Cross multiply
    84,356.40x = 126,680.40 × 54,904.80
  4. Step 4: Simplify right side
    84,356.40x = 6,955,362,025.92
  5. Step 5: Solve for x
    x = 6,955,362,025.92/84,356.40
  6. Step 6: Final answer
    x = 82,452.10

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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.