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Finding the Fourth Proportional to 130,678.71, 180,399.99 and 87,642.47

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Solution

The fourth proportional to 130,678.71, 180,399.99 and 87,642.47 is: 120,989.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,678.71 : 180,399.99 = 87,642.47 : x
  2. Step 2: Convert to fraction form
    130,678.71/180,399.99 = 87,642.47/x
  3. Step 3: Cross multiply
    130,678.71x = 180,399.99 × 87,642.47
  4. Step 4: Simplify right side
    130,678.71x = 15,810,699,809.58
  5. Step 5: Solve for x
    x = 15,810,699,809.58/130,678.71
  6. Step 6: Final answer
    x = 120,989.10

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