Home / 78,231.52-107,931.20-51,388.64

Finding the Fourth Proportional to 78,231.52, 107,931.20 and 51,388.64

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Solution

The fourth proportional to 78,231.52, 107,931.20 and 51,388.64 is: 70,897.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,231.52 : 107,931.20 = 51,388.64 : x
  2. Step 2: Convert to fraction form
    78,231.52/107,931.20 = 51,388.64/x
  3. Step 3: Cross multiply
    78,231.52x = 107,931.20 × 51,388.64
  4. Step 4: Simplify right side
    78,231.52x = 5,546,437,581.57
  5. Step 5: Solve for x
    x = 5,546,437,581.57/78,231.52
  6. Step 6: Final answer
    x = 70,897.74

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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.