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Finding the Fourth Proportional to 61,971.40, 85,686.42 and 54,098.20

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Solution

The fourth proportional to 61,971.40, 85,686.42 and 54,098.20 is: 74,800.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,971.40 : 85,686.42 = 54,098.20 : x
  2. Step 2: Convert to fraction form
    61,971.40/85,686.42 = 54,098.20/x
  3. Step 3: Cross multiply
    61,971.40x = 85,686.42 × 54,098.20
  4. Step 4: Simplify right side
    61,971.40x = 4,635,481,086.44
  5. Step 5: Solve for x
    x = 4,635,481,086.44/61,971.40
  6. Step 6: Final answer
    x = 74,800.33

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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.