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Finding the Fourth Proportional to 158,719.76, 219,039.58 and 87,102.34

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Solution

The fourth proportional to 158,719.76, 219,039.58 and 87,102.34 is: 120,204.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,719.76 : 219,039.58 = 87,102.34 : x
  2. Step 2: Convert to fraction form
    158,719.76/219,039.58 = 87,102.34/x
  3. Step 3: Cross multiply
    158,719.76x = 219,039.58 × 87,102.34
  4. Step 4: Simplify right side
    158,719.76x = 19,078,860,735.97
  5. Step 5: Solve for x
    x = 19,078,860,735.97/158,719.76
  6. Step 6: Final answer
    x = 120,204.70

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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.