Home / 138,678.35-208,147.52-72,165.60

Finding the Fourth Proportional to 138,678.35, 208,147.52 and 72,165.60

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Solution

The fourth proportional to 138,678.35, 208,147.52 and 72,165.60 is: 108,316.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,678.35 : 208,147.52 = 72,165.60 : x
  2. Step 2: Convert to fraction form
    138,678.35/208,147.52 = 72,165.60/x
  3. Step 3: Cross multiply
    138,678.35x = 208,147.52 × 72,165.60
  4. Step 4: Simplify right side
    138,678.35x = 15,021,090,849.73
  5. Step 5: Solve for x
    x = 15,021,090,849.73/138,678.35
  6. Step 6: Final answer
    x = 108,316.05

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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.