Home / 142,943.35-197,256.78-79,287.07

Finding the Fourth Proportional to 142,943.35, 197,256.78 and 79,287.07

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Solution

The fourth proportional to 142,943.35, 197,256.78 and 79,287.07 is: 109,413.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,943.35 : 197,256.78 = 79,287.07 : x
  2. Step 2: Convert to fraction form
    142,943.35/197,256.78 = 79,287.07/x
  3. Step 3: Cross multiply
    142,943.35x = 197,256.78 × 79,287.07
  4. Step 4: Simplify right side
    142,943.35x = 15,639,912,123.83
  5. Step 5: Solve for x
    x = 15,639,912,123.83/142,943.35
  6. Step 6: Final answer
    x = 109,413.36

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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.