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Finding the Fourth Proportional to 76,609.45, 105,720.19 and 42,617.71

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Solution

The fourth proportional to 76,609.45, 105,720.19 and 42,617.71 is: 58,811.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,609.45 : 105,720.19 = 42,617.71 : x
  2. Step 2: Convert to fraction form
    76,609.45/105,720.19 = 42,617.71/x
  3. Step 3: Cross multiply
    76,609.45x = 105,720.19 × 42,617.71
  4. Step 4: Simplify right side
    76,609.45x = 4,505,552,398.56
  5. Step 5: Solve for x
    x = 4,505,552,398.56/76,609.45
  6. Step 6: Final answer
    x = 58,811.97

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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.