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Finding the Fourth Proportional to 61,689.78, 85,132.15 and 33,395.47

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Solution

The fourth proportional to 61,689.78, 85,132.15 and 33,395.47 is: 46,085.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,689.78 : 85,132.15 = 33,395.47 : x
  2. Step 2: Convert to fraction form
    61,689.78/85,132.15 = 33,395.47/x
  3. Step 3: Cross multiply
    61,689.78x = 85,132.15 × 33,395.47
  4. Step 4: Simplify right side
    61,689.78x = 2,843,028,161.36
  5. Step 5: Solve for x
    x = 2,843,028,161.36/61,689.78
  6. Step 6: Final answer
    x = 46,085.89

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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.