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Finding the Fourth Proportional to 138,654.79, 191,344.49 and 74,992.44

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Solution

The fourth proportional to 138,654.79, 191,344.49 and 74,992.44 is: 103,490.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,654.79 : 191,344.49 = 74,992.44 : x
  2. Step 2: Convert to fraction form
    138,654.79/191,344.49 = 74,992.44/x
  3. Step 3: Cross multiply
    138,654.79x = 191,344.49 × 74,992.44
  4. Step 4: Simplify right side
    138,654.79x = 14,349,390,185.66
  5. Step 5: Solve for x
    x = 14,349,390,185.66/138,654.79
  6. Step 6: Final answer
    x = 103,490.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.