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Finding the Fourth Proportional to 57,726.72, 79,664.12 and 31,885.20

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Solution

The fourth proportional to 57,726.72, 79,664.12 and 31,885.20 is: 44,002.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,726.72 : 79,664.12 = 31,885.20 : x
  2. Step 2: Convert to fraction form
    57,726.72/79,664.12 = 31,885.20/x
  3. Step 3: Cross multiply
    57,726.72x = 79,664.12 × 31,885.20
  4. Step 4: Simplify right side
    57,726.72x = 2,540,106,239.60
  5. Step 5: Solve for x
    x = 2,540,106,239.60/57,726.72
  6. Step 6: Final answer
    x = 44,002.26

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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.