Home / 78,086.64-107,685.80-51,252.42

Finding the Fourth Proportional to 78,086.64, 107,685.80 and 51,252.42

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Solution

The fourth proportional to 78,086.64, 107,685.80 and 51,252.42 is: 70,679.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,086.64 : 107,685.80 = 51,252.42 : x
  2. Step 2: Convert to fraction form
    78,086.64/107,685.80 = 51,252.42/x
  3. Step 3: Cross multiply
    78,086.64x = 107,685.80 × 51,252.42
  4. Step 4: Simplify right side
    78,086.64x = 5,519,157,849.64
  5. Step 5: Solve for x
    x = 5,519,157,849.64/78,086.64
  6. Step 6: Final answer
    x = 70,679.92

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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.