Home / 76,899.65-106,121.81-42,909.57

Finding the Fourth Proportional to 76,899.65, 106,121.81 and 42,909.57

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Solution

The fourth proportional to 76,899.65, 106,121.81 and 42,909.57 is: 59,215.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,899.65 : 106,121.81 = 42,909.57 : x
  2. Step 2: Convert to fraction form
    76,899.65/106,121.81 = 42,909.57/x
  3. Step 3: Cross multiply
    76,899.65x = 106,121.81 × 42,909.57
  4. Step 4: Simplify right side
    76,899.65x = 4,553,641,234.72
  5. Step 5: Solve for x
    x = 4,553,641,234.72/76,899.65
  6. Step 6: Final answer
    x = 59,215.37

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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.