Home / 143,215.43-197,637.33-78,688.79

Finding the Fourth Proportional to 143,215.43, 197,637.33 and 78,688.79

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Solution

The fourth proportional to 143,215.43, 197,637.33 and 78,688.79 is: 108,590.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,215.43 : 197,637.33 = 78,688.79 : x
  2. Step 2: Convert to fraction form
    143,215.43/197,637.33 = 78,688.79/x
  3. Step 3: Cross multiply
    143,215.43x = 197,637.33 × 78,688.79
  4. Step 4: Simplify right side
    143,215.43x = 15,551,842,960.42
  5. Step 5: Solve for x
    x = 15,551,842,960.42/143,215.43
  6. Step 6: Final answer
    x = 108,590.56

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1.5x scale

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.