Home / 120,712.10-180,938.55-45,803.30

Finding the Fourth Proportional to 120,712.10, 180,938.55 and 45,803.30

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Solution

The fourth proportional to 120,712.10, 180,938.55 and 45,803.30 is: 68,655.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,712.10 : 180,938.55 = 45,803.30 : x
  2. Step 2: Convert to fraction form
    120,712.10/180,938.55 = 45,803.30/x
  3. Step 3: Cross multiply
    120,712.10x = 180,938.55 × 45,803.30
  4. Step 4: Simplify right side
    120,712.10x = 8,287,582,687.22
  5. Step 5: Solve for x
    x = 8,287,582,687.22/120,712.10
  6. Step 6: Final answer
    x = 68,655.77

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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.