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Finding the Fourth Proportional to 156,830.72, 216,428.36 and 85,211.93

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Solution

The fourth proportional to 156,830.72, 216,428.36 and 85,211.93 is: 117,593.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,830.72 : 216,428.36 = 85,211.93 : x
  2. Step 2: Convert to fraction form
    156,830.72/216,428.36 = 85,211.93/x
  3. Step 3: Cross multiply
    156,830.72x = 216,428.36 × 85,211.93
  4. Step 4: Simplify right side
    156,830.72x = 18,442,278,377.35
  5. Step 5: Solve for x
    x = 18,442,278,377.35/156,830.72
  6. Step 6: Final answer
    x = 117,593.54

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