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Finding the Fourth Proportional to 76,469.16, 105,523.87 and 42,479.85

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Solution

The fourth proportional to 76,469.16, 105,523.87 and 42,479.85 is: 58,620.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,469.16 : 105,523.87 = 42,479.85 : x
  2. Step 2: Convert to fraction form
    76,469.16/105,523.87 = 42,479.85/x
  3. Step 3: Cross multiply
    76,469.16x = 105,523.87 × 42,479.85
  4. Step 4: Simplify right side
    76,469.16x = 4,482,638,169.02
  5. Step 5: Solve for x
    x = 4,482,638,169.02/76,469.16
  6. Step 6: Final answer
    x = 58,620.21

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1.5x scale

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.