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Finding the Fourth Proportional to 66,640.59, 91,961.47 and 36,425.65

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Solution

The fourth proportional to 66,640.59, 91,961.47 and 36,425.65 is: 50,266.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.59 : 91,961.47 = 36,425.65 : x
  2. Step 2: Convert to fraction form
    66,640.59/91,961.47 = 36,425.65/x
  3. Step 3: Cross multiply
    66,640.59x = 91,961.47 × 36,425.65
  4. Step 4: Simplify right side
    66,640.59x = 3,349,756,319.71
  5. Step 5: Solve for x
    x = 3,349,756,319.71/66,640.59
  6. Step 6: Final answer
    x = 50,266.01

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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.