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Finding the Fourth Proportional to 66,109.70, 91,227.60 and 38,522.72

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Solution

The fourth proportional to 66,109.70, 91,227.60 and 38,522.72 is: 53,159.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,109.70 : 91,227.60 = 38,522.72 : x
  2. Step 2: Convert to fraction form
    66,109.70/91,227.60 = 38,522.72/x
  3. Step 3: Cross multiply
    66,109.70x = 91,227.60 × 38,522.72
  4. Step 4: Simplify right side
    66,109.70x = 3,514,335,519.14
  5. Step 5: Solve for x
    x = 3,514,335,519.14/66,109.70
  6. Step 6: Final answer
    x = 53,159.15

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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.