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Finding the Fourth Proportional to 71,520.54, 107,279 and 34,107.06

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Solution

The fourth proportional to 71,520.54, 107,279 and 34,107.06 is: 51,159.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,520.54 : 107,279 = 34,107.06 : x
  2. Step 2: Convert to fraction form
    71,520.54/107,279 = 34,107.06/x
  3. Step 3: Cross multiply
    71,520.54x = 107,279 × 34,107.06
  4. Step 4: Simplify right side
    71,520.54x = 3,658,971,289.74
  5. Step 5: Solve for x
    x = 3,658,971,289.74/71,520.54
  6. Step 6: Final answer
    x = 51,159.73

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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.