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Finding the Fourth Proportional to 159,102.06, 219,561.66 and 87,486.70

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Solution

The fourth proportional to 159,102.06, 219,561.66 and 87,486.70 is: 120,732.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,102.06 : 219,561.66 = 87,486.70 : x
  2. Step 2: Convert to fraction form
    159,102.06/219,561.66 = 87,486.70/x
  3. Step 3: Cross multiply
    159,102.06x = 219,561.66 × 87,486.70
  4. Step 4: Simplify right side
    159,102.06x = 19,208,725,079.92
  5. Step 5: Solve for x
    x = 19,208,725,079.92/159,102.06
  6. Step 6: Final answer
    x = 120,732.10

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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.