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Finding the Fourth Proportional to 118,434.80, 177,652.20 and 78,863.60

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Solution

The fourth proportional to 118,434.80, 177,652.20 and 78,863.60 is: 118,295.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,434.80 : 177,652.20 = 78,863.60 : x
  2. Step 2: Convert to fraction form
    118,434.80/177,652.20 = 78,863.60/x
  3. Step 3: Cross multiply
    118,434.80x = 177,652.20 × 78,863.60
  4. Step 4: Simplify right side
    118,434.80x = 14,010,292,039.92
  5. Step 5: Solve for x
    x = 14,010,292,039.92/118,434.80
  6. Step 6: Final answer
    x = 118,295.40

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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.