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Finding the Fourth Proportional to 138,317.64, 207,402.21 and 43,530.09

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Solution

The fourth proportional to 138,317.64, 207,402.21 and 43,530.09 is: 65,271.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,317.64 : 207,402.21 = 43,530.09 : x
  2. Step 2: Convert to fraction form
    138,317.64/207,402.21 = 43,530.09/x
  3. Step 3: Cross multiply
    138,317.64x = 207,402.21 × 43,530.09
  4. Step 4: Simplify right side
    138,317.64x = 9,028,236,867.50
  5. Step 5: Solve for x
    x = 9,028,236,867.50/138,317.64
  6. Step 6: Final answer
    x = 65,271.77

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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.