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Finding the Fourth Proportional to 123,291.20, 185,023.20 and 53,220.80

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Solution

The fourth proportional to 123,291.20, 185,023.20 and 53,220.80 is: 79,868.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,291.20 : 185,023.20 = 53,220.80 : x
  2. Step 2: Convert to fraction form
    123,291.20/185,023.20 = 53,220.80/x
  3. Step 3: Cross multiply
    123,291.20x = 185,023.20 × 53,220.80
  4. Step 4: Simplify right side
    123,291.20x = 9,847,082,722.56
  5. Step 5: Solve for x
    x = 9,847,082,722.56/123,291.20
  6. Step 6: Final answer
    x = 79,868.50

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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.