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Finding the Fourth Proportional to 121,505.80, 182,258.70 and 85,736.20

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Solution

The fourth proportional to 121,505.80, 182,258.70 and 85,736.20 is: 128,604.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,505.80 : 182,258.70 = 85,736.20 : x
  2. Step 2: Convert to fraction form
    121,505.80/182,258.70 = 85,736.20/x
  3. Step 3: Cross multiply
    121,505.80x = 182,258.70 × 85,736.20
  4. Step 4: Simplify right side
    121,505.80x = 15,626,168,354.94
  5. Step 5: Solve for x
    x = 15,626,168,354.94/121,505.80
  6. Step 6: Final answer
    x = 128,604.30

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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.