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Finding the Fourth Proportional to 61,902.90, 85,422.60 and 36,412.20

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Solution

The fourth proportional to 61,902.90, 85,422.60 and 36,412.20 is: 50,246.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,902.90 : 85,422.60 = 36,412.20 : x
  2. Step 2: Convert to fraction form
    61,902.90/85,422.60 = 36,412.20/x
  3. Step 3: Cross multiply
    61,902.90x = 85,422.60 × 36,412.20
  4. Step 4: Simplify right side
    61,902.90x = 3,110,424,795.72
  5. Step 5: Solve for x
    x = 3,110,424,795.72/61,902.90
  6. Step 6: Final answer
    x = 50,246.83

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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.