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Finding the Fourth Proportional to 210,818.73, 315,721.41 and 120,587.92

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Solution

The fourth proportional to 210,818.73, 315,721.41 and 120,587.92 is: 180,592.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,818.73 : 315,721.41 = 120,587.92 : x
  2. Step 2: Convert to fraction form
    210,818.73/315,721.41 = 120,587.92/x
  3. Step 3: Cross multiply
    210,818.73x = 315,721.41 × 120,587.92
  4. Step 4: Simplify right side
    210,818.73x = 38,072,188,131.37
  5. Step 5: Solve for x
    x = 38,072,188,131.37/210,818.73
  6. Step 6: Final answer
    x = 180,592.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.