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Finding the Fourth Proportional to 61,272.54, 91,918.56 and 21,303.72

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Solution

The fourth proportional to 61,272.54, 91,918.56 and 21,303.72 is: 31,958.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,272.54 : 91,918.56 = 21,303.72 : x
  2. Step 2: Convert to fraction form
    61,272.54/91,918.56 = 21,303.72/x
  3. Step 3: Cross multiply
    61,272.54x = 91,918.56 × 21,303.72
  4. Step 4: Simplify right side
    61,272.54x = 1,958,207,265.04
  5. Step 5: Solve for x
    x = 1,958,207,265.04/61,272.54
  6. Step 6: Final answer
    x = 31,958.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.