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Finding the Fourth Proportional to 61,900.78, 85,423.42 and 36,408.22

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Solution

The fourth proportional to 61,900.78, 85,423.42 and 36,408.22 is: 50,243.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,900.78 : 85,423.42 = 36,408.22 : x
  2. Step 2: Convert to fraction form
    61,900.78/85,423.42 = 36,408.22/x
  3. Step 3: Cross multiply
    61,900.78x = 85,423.42 × 36,408.22
  4. Step 4: Simplify right side
    61,900.78x = 3,110,114,668.51
  5. Step 5: Solve for x
    x = 3,110,114,668.51/61,900.78
  6. Step 6: Final answer
    x = 50,243.55

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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.