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Finding the Fourth Proportional to 66,959.78, 100,439.64 and 25,406.78

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Solution

The fourth proportional to 66,959.78, 100,439.64 and 25,406.78 is: 38,110.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,959.78 : 100,439.64 = 25,406.78 : x
  2. Step 2: Convert to fraction form
    66,959.78/100,439.64 = 25,406.78/x
  3. Step 3: Cross multiply
    66,959.78x = 100,439.64 × 25,406.78
  4. Step 4: Simplify right side
    66,959.78x = 2,551,847,836.76
  5. Step 5: Solve for x
    x = 2,551,847,836.76/66,959.78
  6. Step 6: Final answer
    x = 38,110.16

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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.