Home / 78,240.92-107,972.46-42,431

Finding the Fourth Proportional to 78,240.92, 107,972.46 and 42,431

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Solution

The fourth proportional to 78,240.92, 107,972.46 and 42,431 is: 58,554.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,240.92 : 107,972.46 = 42,431 : x
  2. Step 2: Convert to fraction form
    78,240.92/107,972.46 = 42,431/x
  3. Step 3: Cross multiply
    78,240.92x = 107,972.46 × 42,431
  4. Step 4: Simplify right side
    78,240.92x = 4,581,379,450.26
  5. Step 5: Solve for x
    x = 4,581,379,450.26/78,240.92
  6. Step 6: Final answer
    x = 58,554.77

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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.