Home / 99,719.87-137,664.20-77,007.87

Finding the Fourth Proportional to 99,719.87, 137,664.20 and 77,007.87

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Solution

The fourth proportional to 99,719.87, 137,664.20 and 77,007.87 is: 106,310.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,719.87 : 137,664.20 = 77,007.87 : x
  2. Step 2: Convert to fraction form
    99,719.87/137,664.20 = 77,007.87/x
  3. Step 3: Cross multiply
    99,719.87x = 137,664.20 × 77,007.87
  4. Step 4: Simplify right side
    99,719.87x = 10,601,227,009.77
  5. Step 5: Solve for x
    x = 10,601,227,009.77/99,719.87
  6. Step 6: Final answer
    x = 106,310.08

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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.