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Finding the Fourth Proportional to 66,357.57, 91,574.56 and 36,143.49

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Solution

The fourth proportional to 66,357.57, 91,574.56 and 36,143.49 is: 49,878.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,357.57 : 91,574.56 = 36,143.49 : x
  2. Step 2: Convert to fraction form
    66,357.57/91,574.56 = 36,143.49/x
  3. Step 3: Cross multiply
    66,357.57x = 91,574.56 × 36,143.49
  4. Step 4: Simplify right side
    66,357.57x = 3,309,824,193.61
  5. Step 5: Solve for x
    x = 3,309,824,193.61/66,357.57
  6. Step 6: Final answer
    x = 49,878.62

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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.