Home / 142,831.67-197,107.36-78,300.79

Finding the Fourth Proportional to 142,831.67, 197,107.36 and 78,300.79

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Solution

The fourth proportional to 142,831.67, 197,107.36 and 78,300.79 is: 108,054.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,831.67 : 197,107.36 = 78,300.79 : x
  2. Step 2: Convert to fraction form
    142,831.67/197,107.36 = 78,300.79/x
  3. Step 3: Cross multiply
    142,831.67x = 197,107.36 × 78,300.79
  4. Step 4: Simplify right side
    142,831.67x = 15,433,661,314.29
  5. Step 5: Solve for x
    x = 15,433,661,314.29/142,831.67
  6. Step 6: Final answer
    x = 108,054.90

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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.