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Finding the Fourth Proportional to 159,490.20, 239,235.30 and 70,916.70

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Solution

The fourth proportional to 159,490.20, 239,235.30 and 70,916.70 is: 106,375.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,490.20 : 239,235.30 = 70,916.70 : x
  2. Step 2: Convert to fraction form
    159,490.20/239,235.30 = 70,916.70/x
  3. Step 3: Cross multiply
    159,490.20x = 239,235.30 × 70,916.70
  4. Step 4: Simplify right side
    159,490.20x = 16,965,777,999.51
  5. Step 5: Solve for x
    x = 16,965,777,999.51/159,490.20
  6. Step 6: Final answer
    x = 106,375.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.