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Finding the Fourth Proportional to 60,571.70, 90,857.55 and 21,115.70

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Solution

The fourth proportional to 60,571.70, 90,857.55 and 21,115.70 is: 31,673.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,571.70 : 90,857.55 = 21,115.70 : x
  2. Step 2: Convert to fraction form
    60,571.70/90,857.55 = 21,115.70/x
  3. Step 3: Cross multiply
    60,571.70x = 90,857.55 × 21,115.70
  4. Step 4: Simplify right side
    60,571.70x = 1,918,520,768.54
  5. Step 5: Solve for x
    x = 1,918,520,768.54/60,571.70
  6. Step 6: Final answer
    x = 31,673.55

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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.