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Finding the Fourth Proportional to 61,781.62, 85,267.74 and 39,122.68

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Solution

The fourth proportional to 61,781.62, 85,267.74 and 39,122.68 is: 53,995.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,781.62 : 85,267.74 = 39,122.68 : x
  2. Step 2: Convert to fraction form
    61,781.62/85,267.74 = 39,122.68/x
  3. Step 3: Cross multiply
    61,781.62x = 85,267.74 × 39,122.68
  4. Step 4: Simplify right side
    61,781.62x = 3,335,902,506.34
  5. Step 5: Solve for x
    x = 3,335,902,506.34/61,781.62
  6. Step 6: Final answer
    x = 53,995.06

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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.