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Finding the Fourth Proportional to 218,312.28, 301,269.78 and 122,819.58

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Solution

The fourth proportional to 218,312.28, 301,269.78 and 122,819.58 is: 169,490.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,312.28 : 301,269.78 = 122,819.58 : x
  2. Step 2: Convert to fraction form
    218,312.28/301,269.78 = 122,819.58/x
  3. Step 3: Cross multiply
    218,312.28x = 301,269.78 × 122,819.58
  4. Step 4: Simplify right side
    218,312.28x = 37,001,827,846.29
  5. Step 5: Solve for x
    x = 37,001,827,846.29/218,312.28
  6. Step 6: Final answer
    x = 169,490.36

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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.