Home / 138,730.20-208,095.30-103,300.80

Finding the Fourth Proportional to 138,730.20, 208,095.30 and 103,300.80

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Solution

The fourth proportional to 138,730.20, 208,095.30 and 103,300.80 is: 154,951.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,730.20 : 208,095.30 = 103,300.80 : x
  2. Step 2: Convert to fraction form
    138,730.20/208,095.30 = 103,300.80/x
  3. Step 3: Cross multiply
    138,730.20x = 208,095.30 × 103,300.80
  4. Step 4: Simplify right side
    138,730.20x = 21,496,410,966.24
  5. Step 5: Solve for x
    x = 21,496,410,966.24/138,730.20
  6. Step 6: Final answer
    x = 154,951.20

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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.