Home / 197,991.61-272,964.09-157,290.78

Finding the Fourth Proportional to 197,991.61, 272,964.09 and 157,290.78

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Solution

The fourth proportional to 197,991.61, 272,964.09 and 157,290.78 is: 216,851.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,991.61 : 272,964.09 = 157,290.78 : x
  2. Step 2: Convert to fraction form
    197,991.61/272,964.09 = 157,290.78/x
  3. Step 3: Cross multiply
    197,991.61x = 272,964.09 × 157,290.78
  4. Step 4: Simplify right side
    197,991.61x = 42,934,734,706.12
  5. Step 5: Solve for x
    x = 42,934,734,706.12/197,991.61
  6. Step 6: Final answer
    x = 216,851.29

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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.