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Finding the Fourth Proportional to 159,093.31, 219,548.79 and 87,478.15

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Solution

The fourth proportional to 159,093.31, 219,548.79 and 87,478.15 is: 120,719.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,093.31 : 219,548.79 = 87,478.15 : x
  2. Step 2: Convert to fraction form
    159,093.31/219,548.79 = 87,478.15/x
  3. Step 3: Cross multiply
    159,093.31x = 219,548.79 × 87,478.15
  4. Step 4: Simplify right side
    159,093.31x = 19,205,721,983.94
  5. Step 5: Solve for x
    x = 19,205,721,983.94/159,093.31
  6. Step 6: Final answer
    x = 120,719.86

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1.5x scale

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.