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Finding the Fourth Proportional to 76,642.11, 105,766.81 and 42,652.03

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Solution

The fourth proportional to 76,642.11, 105,766.81 and 42,652.03 is: 58,860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,642.11 : 105,766.81 = 42,652.03 : x
  2. Step 2: Convert to fraction form
    76,642.11/105,766.81 = 42,652.03/x
  3. Step 3: Cross multiply
    76,642.11x = 105,766.81 × 42,652.03
  4. Step 4: Simplify right side
    76,642.11x = 4,511,169,153.12
  5. Step 5: Solve for x
    x = 4,511,169,153.12/76,642.11
  6. Step 6: Final answer
    x = 58,860.19

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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.