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Finding the Fourth Proportional to 120,463.85, 180,697.21 and 57,290.07

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Solution

The fourth proportional to 120,463.85, 180,697.21 and 57,290.07 is: 85,935.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,463.85 : 180,697.21 = 57,290.07 : x
  2. Step 2: Convert to fraction form
    120,463.85/180,697.21 = 57,290.07/x
  3. Step 3: Cross multiply
    120,463.85x = 180,697.21 × 57,290.07
  4. Step 4: Simplify right side
    120,463.85x = 10,352,155,809.70
  5. Step 5: Solve for x
    x = 10,352,155,809.70/120,463.85
  6. Step 6: Final answer
    x = 85,935.79

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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.