Home / 143,357.03-197,837.77-78,831.18

Finding the Fourth Proportional to 143,357.03, 197,837.77 and 78,831.18

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Solution

The fourth proportional to 143,357.03, 197,837.77 and 78,831.18 is: 108,789.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,357.03 : 197,837.77 = 78,831.18 : x
  2. Step 2: Convert to fraction form
    143,357.03/197,837.77 = 78,831.18/x
  3. Step 3: Cross multiply
    143,357.03x = 197,837.77 × 78,831.18
  4. Step 4: Simplify right side
    143,357.03x = 15,595,784,857.67
  5. Step 5: Solve for x
    x = 15,595,784,857.67/143,357.03
  6. Step 6: Final answer
    x = 108,789.82

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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.