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Finding the Fourth Proportional to 57,618.48, 79,513.52 and 31,122.48

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Solution

The fourth proportional to 57,618.48, 79,513.52 and 31,122.48 is: 42,949.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,618.48 : 79,513.52 = 31,122.48 : x
  2. Step 2: Convert to fraction form
    57,618.48/79,513.52 = 31,122.48/x
  3. Step 3: Cross multiply
    57,618.48x = 79,513.52 × 31,122.48
  4. Step 4: Simplify right side
    57,618.48x = 2,474,657,935.93
  5. Step 5: Solve for x
    x = 2,474,657,935.93/57,618.48
  6. Step 6: Final answer
    x = 42,949.03

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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.