Home / 143,214.75-197,636.46-78,688.16

Finding the Fourth Proportional to 143,214.75, 197,636.46 and 78,688.16

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Solution

The fourth proportional to 143,214.75, 197,636.46 and 78,688.16 is: 108,589.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,214.75 : 197,636.46 = 78,688.16 : x
  2. Step 2: Convert to fraction form
    143,214.75/197,636.46 = 78,688.16/x
  3. Step 3: Cross multiply
    143,214.75x = 197,636.46 × 78,688.16
  4. Step 4: Simplify right side
    143,214.75x = 15,551,648,398.13
  5. Step 5: Solve for x
    x = 15,551,648,398.13/143,214.75
  6. Step 6: Final answer
    x = 108,589.71

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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.