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Finding the Fourth Proportional to 100,775.28, 139,071.15 and 55,458.48

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Solution

The fourth proportional to 100,775.28, 139,071.15 and 55,458.48 is: 76,533.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,775.28 : 139,071.15 = 55,458.48 : x
  2. Step 2: Convert to fraction form
    100,775.28/139,071.15 = 55,458.48/x
  3. Step 3: Cross multiply
    100,775.28x = 139,071.15 × 55,458.48
  4. Step 4: Simplify right side
    100,775.28x = 7,712,674,590.85
  5. Step 5: Solve for x
    x = 7,712,674,590.85/100,775.28
  6. Step 6: Final answer
    x = 76,533.40

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