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Finding the Fourth Proportional to 217,072.77, 299,561.32 and 126,490.87

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Solution

The fourth proportional to 217,072.77, 299,561.32 and 126,490.87 is: 174,557.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,072.77 : 299,561.32 = 126,490.87 : x
  2. Step 2: Convert to fraction form
    217,072.77/299,561.32 = 126,490.87/x
  3. Step 3: Cross multiply
    217,072.77x = 299,561.32 × 126,490.87
  4. Step 4: Simplify right side
    217,072.77x = 37,891,771,985.15
  5. Step 5: Solve for x
    x = 37,891,771,985.15/217,072.77
  6. Step 6: Final answer
    x = 174,557.92

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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.