Home / 137,665.80-189,975.76-77,235.36

Finding the Fourth Proportional to 137,665.80, 189,975.76 and 77,235.36

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Solution

The fourth proportional to 137,665.80, 189,975.76 and 77,235.36 is: 106,583.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,665.80 : 189,975.76 = 77,235.36 : x
  2. Step 2: Convert to fraction form
    137,665.80/189,975.76 = 77,235.36/x
  3. Step 3: Cross multiply
    137,665.80x = 189,975.76 × 77,235.36
  4. Step 4: Simplify right side
    137,665.80x = 14,672,846,214.87
  5. Step 5: Solve for x
    x = 14,672,846,214.87/137,665.80
  6. Step 6: Final answer
    x = 106,583.09

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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.