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Finding the Fourth Proportional to 71,436.74, 107,133.21 and 49,391.78

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Solution

The fourth proportional to 71,436.74, 107,133.21 and 49,391.78 is: 74,072.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,436.74 : 107,133.21 = 49,391.78 : x
  2. Step 2: Convert to fraction form
    71,436.74/107,133.21 = 49,391.78/x
  3. Step 3: Cross multiply
    71,436.74x = 107,133.21 × 49,391.78
  4. Step 4: Simplify right side
    71,436.74x = 5,291,499,403.35
  5. Step 5: Solve for x
    x = 5,291,499,403.35/71,436.74
  6. Step 6: Final answer
    x = 74,072.53

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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.