Home / 70,748.13-106,085.67-20,821.76

Finding the Fourth Proportional to 70,748.13, 106,085.67 and 20,821.76

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Solution

The fourth proportional to 70,748.13, 106,085.67 and 20,821.76 is: 31,221.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,748.13 : 106,085.67 = 20,821.76 : x
  2. Step 2: Convert to fraction form
    70,748.13/106,085.67 = 20,821.76/x
  3. Step 3: Cross multiply
    70,748.13x = 106,085.67 × 20,821.76
  4. Step 4: Simplify right side
    70,748.13x = 2,208,889,829.75
  5. Step 5: Solve for x
    x = 2,208,889,829.75/70,748.13
  6. Step 6: Final answer
    x = 31,221.88

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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.