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Finding the Fourth Proportional to 86,915.92, 130,172.52 and 74,126.80

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Solution

The fourth proportional to 86,915.92, 130,172.52 and 74,126.80 is: 111,018.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,915.92 : 130,172.52 = 74,126.80 : x
  2. Step 2: Convert to fraction form
    86,915.92/130,172.52 = 74,126.80/x
  3. Step 3: Cross multiply
    86,915.92x = 130,172.52 × 74,126.80
  4. Step 4: Simplify right side
    86,915.92x = 9,649,272,355.54
  5. Step 5: Solve for x
    x = 9,649,272,355.54/86,915.92
  6. Step 6: Final answer
    x = 111,018.47

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