Home / 137,078.73-205,618.10-77,111.19

Finding the Fourth Proportional to 137,078.73, 205,618.10 and 77,111.19

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Solution

The fourth proportional to 137,078.73, 205,618.10 and 77,111.19 is: 115,666.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,078.73 : 205,618.10 = 77,111.19 : x
  2. Step 2: Convert to fraction form
    137,078.73/205,618.10 = 77,111.19/x
  3. Step 3: Cross multiply
    137,078.73x = 205,618.10 × 77,111.19
  4. Step 4: Simplify right side
    137,078.73x = 15,855,455,990.98
  5. Step 5: Solve for x
    x = 15,855,455,990.98/137,078.73
  6. Step 6: Final answer
    x = 115,666.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.