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Finding the Fourth Proportional to 66,279.61, 91,464.51 and 36,065.53

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Solution

The fourth proportional to 66,279.61, 91,464.51 and 36,065.53 is: 49,769.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,279.61 : 91,464.51 = 36,065.53 : x
  2. Step 2: Convert to fraction form
    66,279.61/91,464.51 = 36,065.53/x
  3. Step 3: Cross multiply
    66,279.61x = 91,464.51 × 36,065.53
  4. Step 4: Simplify right side
    66,279.61x = 3,298,715,849.01
  5. Step 5: Solve for x
    x = 3,298,715,849.01/66,279.61
  6. Step 6: Final answer
    x = 49,769.69

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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.