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Finding the Fourth Proportional to 66,672.99, 91,965.38 and 42,761.79

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Solution

The fourth proportional to 66,672.99, 91,965.38 and 42,761.79 is: 58,983.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,672.99 : 91,965.38 = 42,761.79 : x
  2. Step 2: Convert to fraction form
    66,672.99/91,965.38 = 42,761.79/x
  3. Step 3: Cross multiply
    66,672.99x = 91,965.38 × 42,761.79
  4. Step 4: Simplify right side
    66,672.99x = 3,932,604,053.02
  5. Step 5: Solve for x
    x = 3,932,604,053.02/66,672.99
  6. Step 6: Final answer
    x = 58,983.47

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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.