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Finding the Fourth Proportional to 61,686.48, 85,128.48 and 36,211.08

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Solution

The fourth proportional to 61,686.48, 85,128.48 and 36,211.08 is: 49,971.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,686.48 : 85,128.48 = 36,211.08 : x
  2. Step 2: Convert to fraction form
    61,686.48/85,128.48 = 36,211.08/x
  3. Step 3: Cross multiply
    61,686.48x = 85,128.48 × 36,211.08
  4. Step 4: Simplify right side
    61,686.48x = 3,082,594,199.56
  5. Step 5: Solve for x
    x = 3,082,594,199.56/61,686.48
  6. Step 6: Final answer
    x = 49,971.96

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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.