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Finding the Fourth Proportional to 66,465.63, 91,753.16 and 57,354.75

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Solution

The fourth proportional to 66,465.63, 91,753.16 and 57,354.75 is: 79,175.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465.63 : 91,753.16 = 57,354.75 : x
  2. Step 2: Convert to fraction form
    66,465.63/91,753.16 = 57,354.75/x
  3. Step 3: Cross multiply
    66,465.63x = 91,753.16 × 57,354.75
  4. Step 4: Simplify right side
    66,465.63x = 5,262,479,266.74
  5. Step 5: Solve for x
    x = 5,262,479,266.74/66,465.63
  6. Step 6: Final answer
    x = 79,175.95

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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.