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Finding the Fourth Proportional to 40,959.87, 61,402.13 and 21,197.89

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Solution

The fourth proportional to 40,959.87, 61,402.13 and 21,197.89 is: 31,777.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,959.87 : 61,402.13 = 21,197.89 : x
  2. Step 2: Convert to fraction form
    40,959.87/61,402.13 = 21,197.89/x
  3. Step 3: Cross multiply
    40,959.87x = 61,402.13 × 21,197.89
  4. Step 4: Simplify right side
    40,959.87x = 1,301,595,597.51
  5. Step 5: Solve for x
    x = 1,301,595,597.51/40,959.87
  6. Step 6: Final answer
    x = 31,777.34

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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.