Home / 109,387.20-164,145.60-79,730.40

Finding the Fourth Proportional to 109,387.20, 164,145.60 and 79,730.40

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Solution

The fourth proportional to 109,387.20, 164,145.60 and 79,730.40 is: 119,642.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,387.20 : 164,145.60 = 79,730.40 : x
  2. Step 2: Convert to fraction form
    109,387.20/164,145.60 = 79,730.40/x
  3. Step 3: Cross multiply
    109,387.20x = 164,145.60 × 79,730.40
  4. Step 4: Simplify right side
    109,387.20x = 13,087,394,346.24
  5. Step 5: Solve for x
    x = 13,087,394,346.24/109,387.20
  6. Step 6: Final answer
    x = 119,642.83

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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.