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Finding the Fourth Proportional to 66,125.40, 91,207.72 and 42,241.44

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Solution

The fourth proportional to 66,125.40, 91,207.72 and 42,241.44 is: 58,264.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,125.40 : 91,207.72 = 42,241.44 : x
  2. Step 2: Convert to fraction form
    66,125.40/91,207.72 = 42,241.44/x
  3. Step 3: Cross multiply
    66,125.40x = 91,207.72 × 42,241.44
  4. Step 4: Simplify right side
    66,125.40x = 3,852,745,431.92
  5. Step 5: Solve for x
    x = 3,852,745,431.92/66,125.40
  6. Step 6: Final answer
    x = 58,264.23

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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.