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Finding the Fourth Proportional to 218,394.78, 301,360.05 and 122,899.02

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Solution

The fourth proportional to 218,394.78, 301,360.05 and 122,899.02 is: 169,586.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,394.78 : 301,360.05 = 122,899.02 : x
  2. Step 2: Convert to fraction form
    218,394.78/301,360.05 = 122,899.02/x
  3. Step 3: Cross multiply
    218,394.78x = 301,360.05 × 122,899.02
  4. Step 4: Simplify right side
    218,394.78x = 37,036,854,812.15
  5. Step 5: Solve for x
    x = 37,036,854,812.15/218,394.78
  6. Step 6: Final answer
    x = 169,586.72

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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.