Home / 121,426.60-182,139.90-85,997.20

Finding the Fourth Proportional to 121,426.60, 182,139.90 and 85,997.20

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Solution

The fourth proportional to 121,426.60, 182,139.90 and 85,997.20 is: 128,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,426.60 : 182,139.90 = 85,997.20 : x
  2. Step 2: Convert to fraction form
    121,426.60/182,139.90 = 85,997.20/x
  3. Step 3: Cross multiply
    121,426.60x = 182,139.90 × 85,997.20
  4. Step 4: Simplify right side
    121,426.60x = 15,663,521,408.28
  5. Step 5: Solve for x
    x = 15,663,521,408.28/121,426.60
  6. Step 6: Final answer
    x = 128,995.80

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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.