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Finding the Fourth Proportional to 138,990.27, 191,805.80 and 75,328.05

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Solution

The fourth proportional to 138,990.27, 191,805.80 and 75,328.05 is: 103,952.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,990.27 : 191,805.80 = 75,328.05 : x
  2. Step 2: Convert to fraction form
    138,990.27/191,805.80 = 75,328.05/x
  3. Step 3: Cross multiply
    138,990.27x = 191,805.80 × 75,328.05
  4. Step 4: Simplify right side
    138,990.27x = 14,448,356,516.05
  5. Step 5: Solve for x
    x = 14,448,356,516.05/138,990.27
  6. Step 6: Final answer
    x = 103,952.29

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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.