Home / 143,931.05-215,789.93-68,979.81

Finding the Fourth Proportional to 143,931.05, 215,789.93 and 68,979.81

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Solution

The fourth proportional to 143,931.05, 215,789.93 and 68,979.81 is: 103,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,931.05 : 215,789.93 = 68,979.81 : x
  2. Step 2: Convert to fraction form
    143,931.05/215,789.93 = 68,979.81/x
  3. Step 3: Cross multiply
    143,931.05x = 215,789.93 × 68,979.81
  4. Step 4: Simplify right side
    143,931.05x = 14,885,148,371.31
  5. Step 5: Solve for x
    x = 14,885,148,371.31/143,931.05
  6. Step 6: Final answer
    x = 103,418.60

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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.