Home / 76,721.10-105,874.81-42,729.99

Finding the Fourth Proportional to 76,721.10, 105,874.81 and 42,729.99

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Solution

The fourth proportional to 76,721.10, 105,874.81 and 42,729.99 is: 58,967.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,721.10 : 105,874.81 = 42,729.99 : x
  2. Step 2: Convert to fraction form
    76,721.10/105,874.81 = 42,729.99/x
  3. Step 3: Cross multiply
    76,721.10x = 105,874.81 × 42,729.99
  4. Step 4: Simplify right side
    76,721.10x = 4,524,029,572.55
  5. Step 5: Solve for x
    x = 4,524,029,572.55/76,721.10
  6. Step 6: Final answer
    x = 58,967.21

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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.