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Finding the Fourth Proportional to 66,110.28, 91,223 and 38,887.60

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Solution

The fourth proportional to 66,110.28, 91,223 and 38,887.60 is: 53,659.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,110.28 : 91,223 = 38,887.60 : x
  2. Step 2: Convert to fraction form
    66,110.28/91,223 = 38,887.60/x
  3. Step 3: Cross multiply
    66,110.28x = 91,223 × 38,887.60
  4. Step 4: Simplify right side
    66,110.28x = 3,547,443,078.69
  5. Step 5: Solve for x
    x = 3,547,443,078.69/66,110.28
  6. Step 6: Final answer
    x = 53,659.48

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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.