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Finding the Fourth Proportional to 138,483.39, 207,725.05 and 43,780.02

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Solution

The fourth proportional to 138,483.39, 207,725.05 and 43,780.02 is: 65,670.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,483.39 : 207,725.05 = 43,780.02 : x
  2. Step 2: Convert to fraction form
    138,483.39/207,725.05 = 43,780.02/x
  3. Step 3: Cross multiply
    138,483.39x = 207,725.05 × 43,780.02
  4. Step 4: Simplify right side
    138,483.39x = 9,094,206,843.50
  5. Step 5: Solve for x
    x = 9,094,206,843.50/138,483.39
  6. Step 6: Final answer
    x = 65,670.02

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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.