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Finding the Fourth Proportional to 66,675.74, 91,969.17 and 42,764.54

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Solution

The fourth proportional to 66,675.74, 91,969.17 and 42,764.54 is: 58,987.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,675.74 : 91,969.17 = 42,764.54 : x
  2. Step 2: Convert to fraction form
    66,675.74/91,969.17 = 42,764.54/x
  3. Step 3: Cross multiply
    66,675.74x = 91,969.17 × 42,764.54
  4. Step 4: Simplify right side
    66,675.74x = 3,933,019,249.23
  5. Step 5: Solve for x
    x = 3,933,019,249.23/66,675.74
  6. Step 6: Final answer
    x = 58,987.26

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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.