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Finding the Fourth Proportional to 159,130.76, 219,601.98 and 87,511.28

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Solution

The fourth proportional to 159,130.76, 219,601.98 and 87,511.28 is: 120,766.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,130.76 : 219,601.98 = 87,511.28 : x
  2. Step 2: Convert to fraction form
    159,130.76/219,601.98 = 87,511.28/x
  3. Step 3: Cross multiply
    159,130.76x = 219,601.98 × 87,511.28
  4. Step 4: Simplify right side
    159,130.76x = 19,217,650,360.33
  5. Step 5: Solve for x
    x = 19,217,650,360.33/159,130.76
  6. Step 6: Final answer
    x = 120,766.41

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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.