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Finding the Fourth Proportional to 210,703.56, 290,747.10 and 124,665.18

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Solution

The fourth proportional to 210,703.56, 290,747.10 and 124,665.18 is: 172,023.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,703.56 : 290,747.10 = 124,665.18 : x
  2. Step 2: Convert to fraction form
    210,703.56/290,747.10 = 124,665.18/x
  3. Step 3: Cross multiply
    210,703.56x = 290,747.10 × 124,665.18
  4. Step 4: Simplify right side
    210,703.56x = 36,246,039,555.98
  5. Step 5: Solve for x
    x = 36,246,039,555.98/210,703.56
  6. Step 6: Final answer
    x = 172,023.86

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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.