Home / 61,780.75-85,266.54-39,121.81

Finding the Fourth Proportional to 61,780.75, 85,266.54 and 39,121.81

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Solution

The fourth proportional to 61,780.75, 85,266.54 and 39,121.81 is: 53,993.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,780.75 : 85,266.54 = 39,121.81 : x
  2. Step 2: Convert to fraction form
    61,780.75/85,266.54 = 39,121.81/x
  3. Step 3: Cross multiply
    61,780.75x = 85,266.54 × 39,121.81
  4. Step 4: Simplify right side
    61,780.75x = 3,335,781,164.07
  5. Step 5: Solve for x
    x = 3,335,781,164.07/61,780.75
  6. Step 6: Final answer
    x = 53,993.86

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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.