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Finding the Fourth Proportional to 159,394.08, 219,965.28 and 87,774.39

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Solution

The fourth proportional to 159,394.08, 219,965.28 and 87,774.39 is: 121,129.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,394.08 : 219,965.28 = 87,774.39 : x
  2. Step 2: Convert to fraction form
    159,394.08/219,965.28 = 87,774.39/x
  3. Step 3: Cross multiply
    159,394.08x = 219,965.28 × 87,774.39
  4. Step 4: Simplify right side
    159,394.08x = 19,307,318,273.18
  5. Step 5: Solve for x
    x = 19,307,318,273.18/159,394.08
  6. Step 6: Final answer
    x = 121,129.46

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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.