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Finding the Fourth Proportional to 66,179.68, 91,291 and 40,668.34

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Solution

The fourth proportional to 66,179.68, 91,291 and 40,668.34 is: 56,099.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,179.68 : 91,291 = 40,668.34 : x
  2. Step 2: Convert to fraction form
    66,179.68/91,291 = 40,668.34/x
  3. Step 3: Cross multiply
    66,179.68x = 91,291 × 40,668.34
  4. Step 4: Simplify right side
    66,179.68x = 3,712,653,426.94
  5. Step 5: Solve for x
    x = 3,712,653,426.94/66,179.68
  6. Step 6: Final answer
    x = 56,099.60

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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.