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Finding the Fourth Proportional to 118,705.40, 178,446.90 and 83,886.20

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Solution

The fourth proportional to 118,705.40, 178,446.90 and 83,886.20 is: 126,104.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,705.40 : 178,446.90 = 83,886.20 : x
  2. Step 2: Convert to fraction form
    118,705.40/178,446.90 = 83,886.20/x
  3. Step 3: Cross multiply
    118,705.40x = 178,446.90 × 83,886.20
  4. Step 4: Simplify right side
    118,705.40x = 14,969,232,342.78
  5. Step 5: Solve for x
    x = 14,969,232,342.78/118,705.40
  6. Step 6: Final answer
    x = 126,104.06

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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.