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Finding the Fourth Proportional to 224,394.80, 309,693.60 and 128,919.96

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Solution

The fourth proportional to 224,394.80, 309,693.60 and 128,919.96 is: 177,926.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    224,394.80 : 309,693.60 = 128,919.96 : x
  2. Step 2: Convert to fraction form
    224,394.80/309,693.60 = 128,919.96/x
  3. Step 3: Cross multiply
    224,394.80x = 309,693.60 × 128,919.96
  4. Step 4: Simplify right side
    224,394.80x = 39,925,686,524.26
  5. Step 5: Solve for x
    x = 39,925,686,524.26/224,394.80
  6. Step 6: Final answer
    x = 177,926.08

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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.