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Finding the Fourth Proportional to 86,978.64, 130,511.76 and 64,836.48

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Solution

The fourth proportional to 86,978.64, 130,511.76 and 64,836.48 is: 97,287.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,978.64 : 130,511.76 = 64,836.48 : x
  2. Step 2: Convert to fraction form
    86,978.64/130,511.76 = 64,836.48/x
  3. Step 3: Cross multiply
    86,978.64x = 130,511.76 × 64,836.48
  4. Step 4: Simplify right side
    86,978.64x = 8,461,923,117.00
  5. Step 5: Solve for x
    x = 8,461,923,117.00/86,978.64
  6. Step 6: Final answer
    x = 97,287.37

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