Home / 143,246.47-197,683.42-78,719.72

Finding the Fourth Proportional to 143,246.47, 197,683.42 and 78,719.72

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Solution

The fourth proportional to 143,246.47, 197,683.42 and 78,719.72 is: 108,635.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,246.47 : 197,683.42 = 78,719.72 : x
  2. Step 2: Convert to fraction form
    143,246.47/197,683.42 = 78,719.72/x
  3. Step 3: Cross multiply
    143,246.47x = 197,683.42 × 78,719.72
  4. Step 4: Simplify right side
    143,246.47x = 15,561,583,471.04
  5. Step 5: Solve for x
    x = 15,561,583,471.04/143,246.47
  6. Step 6: Final answer
    x = 108,635.02

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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.