Home / 139,699.28-192,789.10-76,041.20

Finding the Fourth Proportional to 139,699.28, 192,789.10 and 76,041.20

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Solution

The fourth proportional to 139,699.28, 192,789.10 and 76,041.20 is: 104,939.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,699.28 : 192,789.10 = 76,041.20 : x
  2. Step 2: Convert to fraction form
    139,699.28/192,789.10 = 76,041.20/x
  3. Step 3: Cross multiply
    139,699.28x = 192,789.10 × 76,041.20
  4. Step 4: Simplify right side
    139,699.28x = 14,659,914,510.92
  5. Step 5: Solve for x
    x = 14,659,914,510.92/139,699.28
  6. Step 6: Final answer
    x = 104,939.08

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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.