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Finding the Fourth Proportional to 76,642.77, 105,767.73 and 42,652.69

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Solution

The fourth proportional to 76,642.77, 105,767.73 and 42,652.69 is: 58,861.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,642.77 : 105,767.73 = 42,652.69 : x
  2. Step 2: Convert to fraction form
    76,642.77/105,767.73 = 42,652.69/x
  3. Step 3: Cross multiply
    76,642.77x = 105,767.73 × 42,652.69
  4. Step 4: Simplify right side
    76,642.77x = 4,511,278,093.06
  5. Step 5: Solve for x
    x = 4,511,278,093.06/76,642.77
  6. Step 6: Final answer
    x = 58,861.10

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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.