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Finding the Fourth Proportional to 55,290, 76,273.92 and 37,391.28

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Solution

The fourth proportional to 55,290, 76,273.92 and 37,391.28 is: 51,582.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,290 : 76,273.92 = 37,391.28 : x
  2. Step 2: Convert to fraction form
    55,290/76,273.92 = 37,391.28/x
  3. Step 3: Cross multiply
    55,290x = 76,273.92 × 37,391.28
  4. Step 4: Simplify right side
    55,290x = 2,851,979,499.42
  5. Step 5: Solve for x
    x = 2,851,979,499.42/55,290
  6. Step 6: Final answer
    x = 51,582.19

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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.