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Finding the Fourth Proportional to 57,363.40, 79,139.37 and 42,291.88

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Solution

The fourth proportional to 57,363.40, 79,139.37 and 42,291.88 is: 58,346.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,363.40 : 79,139.37 = 42,291.88 : x
  2. Step 2: Convert to fraction form
    57,363.40/79,139.37 = 42,291.88/x
  3. Step 3: Cross multiply
    57,363.40x = 79,139.37 × 42,291.88
  4. Step 4: Simplify right side
    57,363.40x = 3,346,952,739.32
  5. Step 5: Solve for x
    x = 3,346,952,739.32/57,363.40
  6. Step 6: Final answer
    x = 58,346.48

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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.