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Finding the Fourth Proportional to 101,355.12, 139,870.28 and 56,643.12

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Solution

The fourth proportional to 101,355.12, 139,870.28 and 56,643.12 is: 78,167.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,355.12 : 139,870.28 = 56,643.12 : x
  2. Step 2: Convert to fraction form
    101,355.12/139,870.28 = 56,643.12/x
  3. Step 3: Cross multiply
    101,355.12x = 139,870.28 × 56,643.12
  4. Step 4: Simplify right side
    101,355.12x = 7,922,689,054.47
  5. Step 5: Solve for x
    x = 7,922,689,054.47/101,355.12
  6. Step 6: Final answer
    x = 78,167.63

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