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Finding the Fourth Proportional to 56,638.92, 84,986.92 and 40,105.20

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Solution

The fourth proportional to 56,638.92, 84,986.92 and 40,105.20 is: 60,178.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,638.92 : 84,986.92 = 40,105.20 : x
  2. Step 2: Convert to fraction form
    56,638.92/84,986.92 = 40,105.20/x
  3. Step 3: Cross multiply
    56,638.92x = 84,986.92 × 40,105.20
  4. Step 4: Simplify right side
    56,638.92x = 3,408,417,423.98
  5. Step 5: Solve for x
    x = 3,408,417,423.98/56,638.92
  6. Step 6: Final answer
    x = 60,178.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.