Home / 110,747.66-153,031.68-78,861.20

Finding the Fourth Proportional to 110,747.66, 153,031.68 and 78,861.20

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Solution

The fourth proportional to 110,747.66, 153,031.68 and 78,861.20 is: 108,970.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,747.66 : 153,031.68 = 78,861.20 : x
  2. Step 2: Convert to fraction form
    110,747.66/153,031.68 = 78,861.20/x
  3. Step 3: Cross multiply
    110,747.66x = 153,031.68 × 78,861.20
  4. Step 4: Simplify right side
    110,747.66x = 12,068,261,157.66
  5. Step 5: Solve for x
    x = 12,068,261,157.66/110,747.66
  6. Step 6: Final answer
    x = 108,970.81

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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.