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Finding the Fourth Proportional to 66,617.46, 91,889.82 and 50,666.94

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Solution

The fourth proportional to 66,617.46, 91,889.82 and 50,666.94 is: 69,888.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,617.46 : 91,889.82 = 50,666.94 : x
  2. Step 2: Convert to fraction form
    66,617.46/91,889.82 = 50,666.94/x
  3. Step 3: Cross multiply
    66,617.46x = 91,889.82 × 50,666.94
  4. Step 4: Simplify right side
    66,617.46x = 4,655,775,996.55
  5. Step 5: Solve for x
    x = 4,655,775,996.55/66,617.46
  6. Step 6: Final answer
    x = 69,888.22

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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.