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Finding the Fourth Proportional to 138,988.01, 191,803.41 and 75,325.81

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Solution

The fourth proportional to 138,988.01, 191,803.41 and 75,325.81 is: 103,949.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,988.01 : 191,803.41 = 75,325.81 : x
  2. Step 2: Convert to fraction form
    138,988.01/191,803.41 = 75,325.81/x
  3. Step 3: Cross multiply
    138,988.01x = 191,803.41 × 75,325.81
  4. Step 4: Simplify right side
    138,988.01x = 14,447,746,739.50
  5. Step 5: Solve for x
    x = 14,447,746,739.50/138,988.01
  6. Step 6: Final answer
    x = 103,949.59

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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.