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Finding the Fourth Proportional to 156,612, 216,124.71 and 84,992.04

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Solution

The fourth proportional to 156,612, 216,124.71 and 84,992.04 is: 117,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,612 : 216,124.71 = 84,992.04 : x
  2. Step 2: Convert to fraction form
    156,612/216,124.71 = 84,992.04/x
  3. Step 3: Cross multiply
    156,612x = 216,124.71 × 84,992.04
  4. Step 4: Simplify right side
    156,612x = 18,368,879,997.31
  5. Step 5: Solve for x
    x = 18,368,879,997.31/156,612
  6. Step 6: Final answer
    x = 117,289.10

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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.