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Finding the Fourth Proportional to 66,646.04, 91,971.29 and 36,431.39

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Solution

The fourth proportional to 66,646.04, 91,971.29 and 36,431.39 is: 50,275.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,646.04 : 91,971.29 = 36,431.39 : x
  2. Step 2: Convert to fraction form
    66,646.04/91,971.29 = 36,431.39/x
  3. Step 3: Cross multiply
    66,646.04x = 91,971.29 × 36,431.39
  4. Step 4: Simplify right side
    66,646.04x = 3,350,641,292.78
  5. Step 5: Solve for x
    x = 3,350,641,292.78/66,646.04
  6. Step 6: Final answer
    x = 50,275.18

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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.