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Finding the Fourth Proportional to 118,412.70, 177,619.05 and 85,364.70

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Solution

The fourth proportional to 118,412.70, 177,619.05 and 85,364.70 is: 128,047.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,412.70 : 177,619.05 = 85,364.70 : x
  2. Step 2: Convert to fraction form
    118,412.70/177,619.05 = 85,364.70/x
  3. Step 3: Cross multiply
    118,412.70x = 177,619.05 × 85,364.70
  4. Step 4: Simplify right side
    118,412.70x = 15,162,396,917.54
  5. Step 5: Solve for x
    x = 15,162,396,917.54/118,412.70
  6. Step 6: Final answer
    x = 128,047.05

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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.