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Finding the Fourth Proportional to 78,446.99, 117,678.27 and 25,125.58

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Solution

The fourth proportional to 78,446.99, 117,678.27 and 25,125.58 is: 37,690.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,446.99 : 117,678.27 = 25,125.58 : x
  2. Step 2: Convert to fraction form
    78,446.99/117,678.27 = 25,125.58/x
  3. Step 3: Cross multiply
    78,446.99x = 117,678.27 × 25,125.58
  4. Step 4: Simplify right side
    78,446.99x = 2,956,734,787.15
  5. Step 5: Solve for x
    x = 2,956,734,787.15/78,446.99
  6. Step 6: Final answer
    x = 37,690.86

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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.