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Finding the Fourth Proportional to 217,978.19, 300,818.81 and 122,484.66

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Solution

The fourth proportional to 217,978.19, 300,818.81 and 122,484.66 is: 169,033.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,978.19 : 300,818.81 = 122,484.66 : x
  2. Step 2: Convert to fraction form
    217,978.19/300,818.81 = 122,484.66/x
  3. Step 3: Cross multiply
    217,978.19x = 300,818.81 × 122,484.66
  4. Step 4: Simplify right side
    217,978.19x = 36,845,688,842.60
  5. Step 5: Solve for x
    x = 36,845,688,842.60/217,978.19
  6. Step 6: Final answer
    x = 169,033.83

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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.