Home / 138,900.28-208,365.06-45,405.88

Finding the Fourth Proportional to 138,900.28, 208,365.06 and 45,405.88

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Solution

The fourth proportional to 138,900.28, 208,365.06 and 45,405.88 is: 68,113.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,900.28 : 208,365.06 = 45,405.88 : x
  2. Step 2: Convert to fraction form
    138,900.28/208,365.06 = 45,405.88/x
  3. Step 3: Cross multiply
    138,900.28x = 208,365.06 × 45,405.88
  4. Step 4: Simplify right side
    138,900.28x = 9,460,998,910.55
  5. Step 5: Solve for x
    x = 9,460,998,910.55/138,900.28
  6. Step 6: Final answer
    x = 68,113.61

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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.