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Finding the Fourth Proportional to 159,255.78, 219,767.46 and 87,629.10

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Solution

The fourth proportional to 159,255.78, 219,767.46 and 87,629.10 is: 120,925.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,255.78 : 219,767.46 = 87,629.10 : x
  2. Step 2: Convert to fraction form
    159,255.78/219,767.46 = 87,629.10/x
  3. Step 3: Cross multiply
    159,255.78x = 219,767.46 × 87,629.10
  4. Step 4: Simplify right side
    159,255.78x = 19,258,024,729.09
  5. Step 5: Solve for x
    x = 19,258,024,729.09/159,255.78
  6. Step 6: Final answer
    x = 120,925.12

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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.