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Finding the Fourth Proportional to 71,717.36, 98,971.22 and 39,886.27

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Solution

The fourth proportional to 71,717.36, 98,971.22 and 39,886.27 is: 55,043.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,717.36 : 98,971.22 = 39,886.27 : x
  2. Step 2: Convert to fraction form
    71,717.36/98,971.22 = 39,886.27/x
  3. Step 3: Cross multiply
    71,717.36x = 98,971.22 × 39,886.27
  4. Step 4: Simplify right side
    71,717.36x = 3,947,592,655.44
  5. Step 5: Solve for x
    x = 3,947,592,655.44/71,717.36
  6. Step 6: Final answer
    x = 55,043.76

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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.