Home / 86,629.71-129,990.10-61,491.45

Finding the Fourth Proportional to 86,629.71, 129,990.10 and 61,491.45

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Solution

The fourth proportional to 86,629.71, 129,990.10 and 61,491.45 is: 92,269.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,629.71 : 129,990.10 = 61,491.45 : x
  2. Step 2: Convert to fraction form
    86,629.71/129,990.10 = 61,491.45/x
  3. Step 3: Cross multiply
    86,629.71x = 129,990.10 × 61,491.45
  4. Step 4: Simplify right side
    86,629.71x = 7,993,279,734.65
  5. Step 5: Solve for x
    x = 7,993,279,734.65/86,629.71
  6. Step 6: Final answer
    x = 92,269.50

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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.