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Finding the Fourth Proportional to 66,215.76, 91,377.76 and 36,407.76

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Solution

The fourth proportional to 66,215.76, 91,377.76 and 36,407.76 is: 50,242.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,215.76 : 91,377.76 = 36,407.76 : x
  2. Step 2: Convert to fraction form
    66,215.76/91,377.76 = 36,407.76/x
  3. Step 3: Cross multiply
    66,215.76x = 91,377.76 × 36,407.76
  4. Step 4: Simplify right side
    66,215.76x = 3,326,859,555.42
  5. Step 5: Solve for x
    x = 3,326,859,555.42/66,215.76
  6. Step 6: Final answer
    x = 50,242.71

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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.