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Finding the Fourth Proportional to 57,362.40, 79,137.99 and 42,290.88

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Solution

The fourth proportional to 57,362.40, 79,137.99 and 42,290.88 is: 58,345.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,362.40 : 79,137.99 = 42,290.88 : x
  2. Step 2: Convert to fraction form
    57,362.40/79,137.99 = 42,290.88/x
  3. Step 3: Cross multiply
    57,362.40x = 79,137.99 × 42,290.88
  4. Step 4: Simplify right side
    57,362.40x = 3,346,815,238.53
  5. Step 5: Solve for x
    x = 3,346,815,238.53/57,362.40
  6. Step 6: Final answer
    x = 58,345.10

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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.