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Finding the Fourth Proportional to 66,947.78, 100,421.64 and 25,394.78

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Solution

The fourth proportional to 66,947.78, 100,421.64 and 25,394.78 is: 38,092.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,947.78 : 100,421.64 = 25,394.78 : x
  2. Step 2: Convert to fraction form
    66,947.78/100,421.64 = 25,394.78/x
  3. Step 3: Cross multiply
    66,947.78x = 100,421.64 × 25,394.78
  4. Step 4: Simplify right side
    66,947.78x = 2,550,185,455.04
  5. Step 5: Solve for x
    x = 2,550,185,455.04/66,947.78
  6. Step 6: Final answer
    x = 38,092.16

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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.