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Finding the Fourth Proportional to 131,328, 197,059.68 and 72,210.24

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Solution

The fourth proportional to 131,328, 197,059.68 and 72,210.24 is: 108,352.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,328 : 197,059.68 = 72,210.24 : x
  2. Step 2: Convert to fraction form
    131,328/197,059.68 = 72,210.24/x
  3. Step 3: Cross multiply
    131,328x = 197,059.68 × 72,210.24
  4. Step 4: Simplify right side
    131,328x = 14,229,726,787.12
  5. Step 5: Solve for x
    x = 14,229,726,787.12/131,328
  6. Step 6: Final answer
    x = 108,352.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.