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Finding the Fourth Proportional to 66,164.88, 91,315.38 and 37,879.68

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Solution

The fourth proportional to 66,164.88, 91,315.38 and 37,879.68 is: 52,278.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,164.88 : 91,315.38 = 37,879.68 : x
  2. Step 2: Convert to fraction form
    66,164.88/91,315.38 = 37,879.68/x
  3. Step 3: Cross multiply
    66,164.88x = 91,315.38 × 37,879.68
  4. Step 4: Simplify right side
    66,164.88x = 3,458,997,373.48
  5. Step 5: Solve for x
    x = 3,458,997,373.48/66,164.88
  6. Step 6: Final answer
    x = 52,278.45

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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.