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Finding the Fourth Proportional to 66,019.20, 91,112.76 and 37,719.42

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Solution

The fourth proportional to 66,019.20, 91,112.76 and 37,719.42 is: 52,056.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,019.20 : 91,112.76 = 37,719.42 : x
  2. Step 2: Convert to fraction form
    66,019.20/91,112.76 = 37,719.42/x
  3. Step 3: Cross multiply
    66,019.20x = 91,112.76 × 37,719.42
  4. Step 4: Simplify right side
    66,019.20x = 3,436,720,461.80
  5. Step 5: Solve for x
    x = 3,436,720,461.80/66,019.20
  6. Step 6: Final answer
    x = 52,056.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.