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Finding the Fourth Proportional to 57,479.76, 79,371.96 and 42,398.64

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Solution

The fourth proportional to 57,479.76, 79,371.96 and 42,398.64 is: 58,546.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,479.76 : 79,371.96 = 42,398.64 : x
  2. Step 2: Convert to fraction form
    57,479.76/79,371.96 = 42,398.64/x
  3. Step 3: Cross multiply
    57,479.76x = 79,371.96 × 42,398.64
  4. Step 4: Simplify right side
    57,479.76x = 3,365,263,158.13
  5. Step 5: Solve for x
    x = 3,365,263,158.13/57,479.76
  6. Step 6: Final answer
    x = 58,546.92

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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.