Home / 143,417.34-197,920.68-78,889.26

Finding the Fourth Proportional to 143,417.34, 197,920.68 and 78,889.26

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Solution

The fourth proportional to 143,417.34, 197,920.68 and 78,889.26 is: 108,869.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,417.34 : 197,920.68 = 78,889.26 : x
  2. Step 2: Convert to fraction form
    143,417.34/197,920.68 = 78,889.26/x
  3. Step 3: Cross multiply
    143,417.34x = 197,920.68 × 78,889.26
  4. Step 4: Simplify right side
    143,417.34x = 15,613,815,983.90
  5. Step 5: Solve for x
    x = 15,613,815,983.90/143,417.34
  6. Step 6: Final answer
    x = 108,869.79

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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.