Home / 138,730.20-208,095.30-49,986.60

Finding the Fourth Proportional to 138,730.20, 208,095.30 and 49,986.60

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Solution

The fourth proportional to 138,730.20, 208,095.30 and 49,986.60 is: 74,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,730.20 : 208,095.30 = 49,986.60 : x
  2. Step 2: Convert to fraction form
    138,730.20/208,095.30 = 49,986.60/x
  3. Step 3: Cross multiply
    138,730.20x = 208,095.30 × 49,986.60
  4. Step 4: Simplify right side
    138,730.20x = 10,401,976,522.98
  5. Step 5: Solve for x
    x = 10,401,976,522.98/138,730.20
  6. Step 6: Final answer
    x = 74,979.90

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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.