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Finding the Fourth Proportional to 138,990.96, 191,802.38 and 75,327.39

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Solution

The fourth proportional to 138,990.96, 191,802.38 and 75,327.39 is: 103,949.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,990.96 : 191,802.38 = 75,327.39 : x
  2. Step 2: Convert to fraction form
    138,990.96/191,802.38 = 75,327.39/x
  3. Step 3: Cross multiply
    138,990.96x = 191,802.38 × 75,327.39
  4. Step 4: Simplify right side
    138,990.96x = 14,447,972,304.55
  5. Step 5: Solve for x
    x = 14,447,972,304.55/138,990.96
  6. Step 6: Final answer
    x = 103,949.01

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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.