Home / 138,731.52-191,427.84-79,104

Finding the Fourth Proportional to 138,731.52, 191,427.84 and 79,104

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Solution

The fourth proportional to 138,731.52, 191,427.84 and 79,104 is: 109,151.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,731.52 : 191,427.84 = 79,104 : x
  2. Step 2: Convert to fraction form
    138,731.52/191,427.84 = 79,104/x
  3. Step 3: Cross multiply
    138,731.52x = 191,427.84 × 79,104
  4. Step 4: Simplify right side
    138,731.52x = 15,142,707,855.36
  5. Step 5: Solve for x
    x = 15,142,707,855.36/138,731.52
  6. Step 6: Final answer
    x = 109,151.17

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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.