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Finding the Fourth Proportional to 156,718, 216,270.96 and 85,098.04

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Solution

The fourth proportional to 156,718, 216,270.96 and 85,098.04 is: 117,435.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,718 : 216,270.96 = 85,098.04 : x
  2. Step 2: Convert to fraction form
    156,718/216,270.96 = 85,098.04/x
  3. Step 3: Cross multiply
    156,718x = 216,270.96 × 85,098.04
  4. Step 4: Simplify right side
    156,718x = 18,404,234,804.92
  5. Step 5: Solve for x
    x = 18,404,234,804.92/156,718
  6. Step 6: Final answer
    x = 117,435.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.