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Finding the Fourth Proportional to 139,499.12, 192,508.20 and 75,837.20

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Solution

The fourth proportional to 139,499.12, 192,508.20 and 75,837.20 is: 104,655.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,499.12 : 192,508.20 = 75,837.20 : x
  2. Step 2: Convert to fraction form
    139,499.12/192,508.20 = 75,837.20/x
  3. Step 3: Cross multiply
    139,499.12x = 192,508.20 × 75,837.20
  4. Step 4: Simplify right side
    139,499.12x = 14,599,282,865.04
  5. Step 5: Solve for x
    x = 14,599,282,865.04/139,499.12
  6. Step 6: Final answer
    x = 104,655.02

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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.