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Finding the Fourth Proportional to 71,330.09, 106,987.01 and 18,743.67

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Solution

The fourth proportional to 71,330.09, 106,987.01 and 18,743.67 is: 28,113.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,330.09 : 106,987.01 = 18,743.67 : x
  2. Step 2: Convert to fraction form
    71,330.09/106,987.01 = 18,743.67/x
  3. Step 3: Cross multiply
    71,330.09x = 106,987.01 × 18,743.67
  4. Step 4: Simplify right side
    71,330.09x = 2,005,329,116.01
  5. Step 5: Solve for x
    x = 2,005,329,116.01/71,330.09
  6. Step 6: Final answer
    x = 28,113.37

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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.