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Finding the Fourth Proportional to 100,978, 139,349.68 and 58,561.12

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Solution

The fourth proportional to 100,978, 139,349.68 and 58,561.12 is: 80,814.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,978 : 139,349.68 = 58,561.12 : x
  2. Step 2: Convert to fraction form
    100,978/139,349.68 = 58,561.12/x
  3. Step 3: Cross multiply
    100,978x = 139,349.68 × 58,561.12
  4. Step 4: Simplify right side
    100,978x = 8,160,473,332.44
  5. Step 5: Solve for x
    x = 8,160,473,332.44/100,978
  6. Step 6: Final answer
    x = 80,814.37

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Why These Related Problems?

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