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Finding the Fourth Proportional to 191,978,317.92, 287,829,925.52 and 81,321,444.48

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Solution

The fourth proportional to 191,978,317.92, 287,829,925.52 and 81,321,444.48 is: 121,923,900.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,978,317.92 : 287,829,925.52 = 81,321,444.48 : x
  2. Step 2: Convert to fraction form
    191,978,317.92/287,829,925.52 = 81,321,444.48/x
  3. Step 3: Cross multiply
    191,978,317.92x = 287,829,925.52 × 81,321,444.48
  4. Step 4: Simplify right side
    191,978,317.92x = 23,406,745,307,857,216
  5. Step 5: Solve for x
    x = 23,406,745,307,857,216/191,978,317.92
  6. Step 6: Final answer
    x = 121,923,900.37

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