Home / 121,983.60-182,975.40-80,128.20

Finding the Fourth Proportional to 121,983.60, 182,975.40 and 80,128.20

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Solution

The fourth proportional to 121,983.60, 182,975.40 and 80,128.20 is: 120,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,983.60 : 182,975.40 = 80,128.20 : x
  2. Step 2: Convert to fraction form
    121,983.60/182,975.40 = 80,128.20/x
  3. Step 3: Cross multiply
    121,983.60x = 182,975.40 × 80,128.20
  4. Step 4: Simplify right side
    121,983.60x = 14,661,489,446.28
  5. Step 5: Solve for x
    x = 14,661,489,446.28/121,983.60
  6. Step 6: Final answer
    x = 120,192.30

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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.