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Finding the Fourth Proportional to 159,213.12, 219,719.88 and 87,598.68

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Solution

The fourth proportional to 159,213.12, 219,719.88 and 87,598.68 is: 120,889.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,213.12 : 219,719.88 = 87,598.68 : x
  2. Step 2: Convert to fraction form
    159,213.12/219,719.88 = 87,598.68/x
  3. Step 3: Cross multiply
    159,213.12x = 219,719.88 × 87,598.68
  4. Step 4: Simplify right side
    159,213.12x = 19,247,171,457.76
  5. Step 5: Solve for x
    x = 19,247,171,457.76/159,213.12
  6. Step 6: Final answer
    x = 120,889.36

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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.