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Finding the Fourth Proportional to 57,079.81, 78,764.74 and 38,645.41

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Solution

The fourth proportional to 57,079.81, 78,764.74 and 38,645.41 is: 53,327.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,079.81 : 78,764.74 = 38,645.41 : x
  2. Step 2: Convert to fraction form
    57,079.81/78,764.74 = 38,645.41/x
  3. Step 3: Cross multiply
    57,079.81x = 78,764.74 × 38,645.41
  4. Step 4: Simplify right side
    57,079.81x = 3,043,895,670.84
  5. Step 5: Solve for x
    x = 3,043,895,670.84/57,079.81
  6. Step 6: Final answer
    x = 53,327.01

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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.