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Finding the Fourth Proportional to 66,785.52, 100,019.25 and 38,646.27

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Solution

The fourth proportional to 66,785.52, 100,019.25 and 38,646.27 is: 57,877.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,785.52 : 100,019.25 = 38,646.27 : x
  2. Step 2: Convert to fraction form
    66,785.52/100,019.25 = 38,646.27/x
  3. Step 3: Cross multiply
    66,785.52x = 100,019.25 × 38,646.27
  4. Step 4: Simplify right side
    66,785.52x = 3,865,370,940.70
  5. Step 5: Solve for x
    x = 3,865,370,940.70/66,785.52
  6. Step 6: Final answer
    x = 57,877.38

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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.