Home / 142,783.62-197,042.70-79,122.78

Finding the Fourth Proportional to 142,783.62, 197,042.70 and 79,122.78

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Solution

The fourth proportional to 142,783.62, 197,042.70 and 79,122.78 is: 109,190.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783.62 : 197,042.70 = 79,122.78 : x
  2. Step 2: Convert to fraction form
    142,783.62/197,042.70 = 79,122.78/x
  3. Step 3: Cross multiply
    142,783.62x = 197,042.70 × 79,122.78
  4. Step 4: Simplify right side
    142,783.62x = 15,590,566,202.71
  5. Step 5: Solve for x
    x = 15,590,566,202.71/142,783.62
  6. Step 6: Final answer
    x = 109,190.16

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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.