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Finding the Fourth Proportional to 61,841.78, 85,301.31 and 39,157.13

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Solution

The fourth proportional to 61,841.78, 85,301.31 and 39,157.13 is: 54,011.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,841.78 : 85,301.31 = 39,157.13 : x
  2. Step 2: Convert to fraction form
    61,841.78/85,301.31 = 39,157.13/x
  3. Step 3: Cross multiply
    61,841.78x = 85,301.31 × 39,157.13
  4. Step 4: Simplify right side
    61,841.78x = 3,340,154,484.84
  5. Step 5: Solve for x
    x = 3,340,154,484.84/61,841.78
  6. Step 6: Final answer
    x = 54,011.29

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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.