Home / 106,597.28-159,996.38-78,431.45

Finding the Fourth Proportional to 106,597.28, 159,996.38 and 78,431.45

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Solution

The fourth proportional to 106,597.28, 159,996.38 and 78,431.45 is: 117,721.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,597.28 : 159,996.38 = 78,431.45 : x
  2. Step 2: Convert to fraction form
    106,597.28/159,996.38 = 78,431.45/x
  3. Step 3: Cross multiply
    106,597.28x = 159,996.38 × 78,431.45
  4. Step 4: Simplify right side
    106,597.28x = 12,548,748,078.15
  5. Step 5: Solve for x
    x = 12,548,748,078.15/106,597.28
  6. Step 6: Final answer
    x = 117,721.09

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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.