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Finding the Fourth Proportional to 138,456.65, 191,070.17 and 74,794.44

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Solution

The fourth proportional to 138,456.65, 191,070.17 and 74,794.44 is: 103,216.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,456.65 : 191,070.17 = 74,794.44 : x
  2. Step 2: Convert to fraction form
    138,456.65/191,070.17 = 74,794.44/x
  3. Step 3: Cross multiply
    138,456.65x = 191,070.17 × 74,794.44
  4. Step 4: Simplify right side
    138,456.65x = 14,290,986,552.84
  5. Step 5: Solve for x
    x = 14,290,986,552.84/138,456.65
  6. Step 6: Final answer
    x = 103,216.33

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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.