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Finding the Fourth Proportional to 211,230.72, 316,845.81 and 84,870.81

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Solution

The fourth proportional to 211,230.72, 316,845.81 and 84,870.81 is: 127,306.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,230.72 : 316,845.81 = 84,870.81 : x
  2. Step 2: Convert to fraction form
    211,230.72/316,845.81 = 84,870.81/x
  3. Step 3: Cross multiply
    211,230.72x = 316,845.81 × 84,870.81
  4. Step 4: Simplify right side
    211,230.72x = 26,890,960,539.81
  5. Step 5: Solve for x
    x = 26,890,960,539.81/211,230.72
  6. Step 6: Final answer
    x = 127,306.11

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