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Finding the Fourth Proportional to 83,904.40, 125,856.60 and 80,678.80

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Solution

The fourth proportional to 83,904.40, 125,856.60 and 80,678.80 is: 121,018.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,904.40 : 125,856.60 = 80,678.80 : x
  2. Step 2: Convert to fraction form
    83,904.40/125,856.60 = 80,678.80/x
  3. Step 3: Cross multiply
    83,904.40x = 125,856.60 × 80,678.80
  4. Step 4: Simplify right side
    83,904.40x = 10,153,959,460.08
  5. Step 5: Solve for x
    x = 10,153,959,460.08/83,904.40
  6. Step 6: Final answer
    x = 121,018.20

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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.