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Finding the Fourth Proportional to 71,717.63, 98,973.06 and 39,888.83

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Solution

The fourth proportional to 71,717.63, 98,973.06 and 39,888.83 is: 55,048.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,717.63 : 98,973.06 = 39,888.83 : x
  2. Step 2: Convert to fraction form
    71,717.63/98,973.06 = 39,888.83/x
  3. Step 3: Cross multiply
    71,717.63x = 98,973.06 × 39,888.83
  4. Step 4: Simplify right side
    71,717.63x = 3,947,919,564.92
  5. Step 5: Solve for x
    x = 3,947,919,564.92/71,717.63
  6. Step 6: Final answer
    x = 55,048.10

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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.