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Finding the Fourth Proportional to 170,987.40, 256,481.10 and 156,990.60

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Solution

The fourth proportional to 170,987.40, 256,481.10 and 156,990.60 is: 235,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,987.40 : 256,481.10 = 156,990.60 : x
  2. Step 2: Convert to fraction form
    170,987.40/256,481.10 = 156,990.60/x
  3. Step 3: Cross multiply
    170,987.40x = 256,481.10 × 156,990.60
  4. Step 4: Simplify right side
    170,987.40x = 40,265,121,777.66
  5. Step 5: Solve for x
    x = 40,265,121,777.66/170,987.40
  6. Step 6: Final answer
    x = 235,485.90

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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.