Home / 77,131.28-115,804-39,718.10

Finding the Fourth Proportional to 77,131.28, 115,804 and 39,718.10

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Solution

The fourth proportional to 77,131.28, 115,804 and 39,718.10 is: 59,632.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,131.28 : 115,804 = 39,718.10 : x
  2. Step 2: Convert to fraction form
    77,131.28/115,804 = 39,718.10/x
  3. Step 3: Cross multiply
    77,131.28x = 115,804 × 39,718.10
  4. Step 4: Simplify right side
    77,131.28x = 4,599,514,852.40
  5. Step 5: Solve for x
    x = 4,599,514,852.40/77,131.28
  6. Step 6: Final answer
    x = 59,632.29

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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.