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Finding the Fourth Proportional to 142,943.36, 197,256.81 and 79,287.08

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Solution

The fourth proportional to 142,943.36, 197,256.81 and 79,287.08 is: 109,413.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,943.36 : 197,256.81 = 79,287.08 : x
  2. Step 2: Convert to fraction form
    142,943.36/197,256.81 = 79,287.08/x
  3. Step 3: Cross multiply
    142,943.36x = 197,256.81 × 79,287.08
  4. Step 4: Simplify right side
    142,943.36x = 15,639,915,488.73
  5. Step 5: Solve for x
    x = 15,639,915,488.73/142,943.36
  6. Step 6: Final answer
    x = 109,413.38

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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.