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Finding the Fourth Proportional to 71,903.44, 107,859.76 and 21,985.32

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Solution

The fourth proportional to 71,903.44, 107,859.76 and 21,985.32 is: 32,979.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,903.44 : 107,859.76 = 21,985.32 : x
  2. Step 2: Convert to fraction form
    71,903.44/107,859.76 = 21,985.32/x
  3. Step 3: Cross multiply
    71,903.44x = 107,859.76 × 21,985.32
  4. Step 4: Simplify right side
    71,903.44x = 2,371,331,338.72
  5. Step 5: Solve for x
    x = 2,371,331,338.72/71,903.44
  6. Step 6: Final answer
    x = 32,979.39

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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.