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Finding the Fourth Proportional to 66,141.12, 91,275.12 and 39,284.88

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Solution

The fourth proportional to 66,141.12, 91,275.12 and 39,284.88 is: 54,213.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,141.12 : 91,275.12 = 39,284.88 : x
  2. Step 2: Convert to fraction form
    66,141.12/91,275.12 = 39,284.88/x
  3. Step 3: Cross multiply
    66,141.12x = 91,275.12 × 39,284.88
  4. Step 4: Simplify right side
    66,141.12x = 3,585,732,136.19
  5. Step 5: Solve for x
    x = 3,585,732,136.19/66,141.12
  6. Step 6: Final answer
    x = 54,213.36

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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.