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Finding the Fourth Proportional to 66,382.76, 91,697.73 and 61,658.84

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Solution

The fourth proportional to 66,382.76, 91,697.73 and 61,658.84 is: 85,172.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,382.76 : 91,697.73 = 61,658.84 : x
  2. Step 2: Convert to fraction form
    66,382.76/91,697.73 = 61,658.84/x
  3. Step 3: Cross multiply
    66,382.76x = 91,697.73 × 61,658.84
  4. Step 4: Simplify right side
    66,382.76x = 5,653,975,662.43
  5. Step 5: Solve for x
    x = 5,653,975,662.43/66,382.76
  6. Step 6: Final answer
    x = 85,172.35

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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.