Home / 80,478.58-120,720.40-38,363.24

Finding the Fourth Proportional to 80,478.58, 120,720.40 and 38,363.24

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Solution

The fourth proportional to 80,478.58, 120,720.40 and 38,363.24 is: 57,546.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,478.58 : 120,720.40 = 38,363.24 : x
  2. Step 2: Convert to fraction form
    80,478.58/120,720.40 = 38,363.24/x
  3. Step 3: Cross multiply
    80,478.58x = 120,720.40 × 38,363.24
  4. Step 4: Simplify right side
    80,478.58x = 4,631,225,678.10
  5. Step 5: Solve for x
    x = 4,631,225,678.10/80,478.58
  6. Step 6: Final answer
    x = 57,546.07

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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.