Home / 120,731.28-180,961.38-56,720.76

Finding the Fourth Proportional to 120,731.28, 180,961.38 and 56,720.76

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Solution

The fourth proportional to 120,731.28, 180,961.38 and 56,720.76 is: 85,017.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,731.28 : 180,961.38 = 56,720.76 : x
  2. Step 2: Convert to fraction form
    120,731.28/180,961.38 = 56,720.76/x
  3. Step 3: Cross multiply
    120,731.28x = 180,961.38 × 56,720.76
  4. Step 4: Simplify right side
    120,731.28x = 10,264,267,004.25
  5. Step 5: Solve for x
    x = 10,264,267,004.25/120,731.28
  6. Step 6: Final answer
    x = 85,017.46

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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.