Home / 138,109.42-207,172.91-43,343.35

Finding the Fourth Proportional to 138,109.42, 207,172.91 and 43,343.35

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Solution

The fourth proportional to 138,109.42, 207,172.91 and 43,343.35 is: 65,017.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,109.42 : 207,172.91 = 43,343.35 : x
  2. Step 2: Convert to fraction form
    138,109.42/207,172.91 = 43,343.35/x
  3. Step 3: Cross multiply
    138,109.42x = 207,172.91 × 43,343.35
  4. Step 4: Simplify right side
    138,109.42x = 8,979,567,214.00
  5. Step 5: Solve for x
    x = 8,979,567,214.00/138,109.42
  6. Step 6: Final answer
    x = 65,017.78

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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.