Home / 81,939.60-122,951.52-70,917.12

Finding the Fourth Proportional to 81,939.60, 122,951.52 and 70,917.12

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Solution

The fourth proportional to 81,939.60, 122,951.52 and 70,917.12 is: 106,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,939.60 : 122,951.52 = 70,917.12 : x
  2. Step 2: Convert to fraction form
    81,939.60/122,951.52 = 70,917.12/x
  3. Step 3: Cross multiply
    81,939.60x = 122,951.52 × 70,917.12
  4. Step 4: Simplify right side
    81,939.60x = 8,719,367,698.02
  5. Step 5: Solve for x
    x = 8,719,367,698.02/81,939.60
  6. Step 6: Final answer
    x = 106,412.13

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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.