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Finding the Fourth Proportional to 215,978.59, 298,109.73 and 125,363.75

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Solution

The fourth proportional to 215,978.59, 298,109.73 and 125,363.75 is: 173,036.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,978.59 : 298,109.73 = 125,363.75 : x
  2. Step 2: Convert to fraction form
    215,978.59/298,109.73 = 125,363.75/x
  3. Step 3: Cross multiply
    215,978.59x = 298,109.73 × 125,363.75
  4. Step 4: Simplify right side
    215,978.59x = 37,372,153,664.29
  5. Step 5: Solve for x
    x = 37,372,153,664.29/215,978.59
  6. Step 6: Final answer
    x = 173,036.38

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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.