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Finding the Fourth Proportional to 66,708.16, 100,012.56 and 40,406.56

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Solution

The fourth proportional to 66,708.16, 100,012.56 and 40,406.56 is: 60,579.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,708.16 : 100,012.56 = 40,406.56 : x
  2. Step 2: Convert to fraction form
    66,708.16/100,012.56 = 40,406.56/x
  3. Step 3: Cross multiply
    66,708.16x = 100,012.56 × 40,406.56
  4. Step 4: Simplify right side
    66,708.16x = 4,041,163,506.39
  5. Step 5: Solve for x
    x = 4,041,163,506.39/66,708.16
  6. Step 6: Final answer
    x = 60,579.75

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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.