Home / 86,696.16-129,937.76-49,287.60

Finding the Fourth Proportional to 86,696.16, 129,937.76 and 49,287.60

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Solution

The fourth proportional to 86,696.16, 129,937.76 and 49,287.60 is: 73,870.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,696.16 : 129,937.76 = 49,287.60 : x
  2. Step 2: Convert to fraction form
    86,696.16/129,937.76 = 49,287.60/x
  3. Step 3: Cross multiply
    86,696.16x = 129,937.76 × 49,287.60
  4. Step 4: Simplify right side
    86,696.16x = 6,404,320,339.78
  5. Step 5: Solve for x
    x = 6,404,320,339.78/86,696.16
  6. Step 6: Final answer
    x = 73,870.87

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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.