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Finding the Fourth Proportional to 138,693.30, 207,918.45 and 94,175.70

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Solution

The fourth proportional to 138,693.30, 207,918.45 and 94,175.70 is: 141,181.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,693.30 : 207,918.45 = 94,175.70 : x
  2. Step 2: Convert to fraction form
    138,693.30/207,918.45 = 94,175.70/x
  3. Step 3: Cross multiply
    138,693.30x = 207,918.45 × 94,175.70
  4. Step 4: Simplify right side
    138,693.30x = 19,580,865,571.67
  5. Step 5: Solve for x
    x = 19,580,865,571.67/138,693.30
  6. Step 6: Final answer
    x = 141,181.05

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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.