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Finding the Fourth Proportional to 74,644.72, 103,140.80 and 59,661

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Solution

The fourth proportional to 74,644.72, 103,140.80 and 59,661 is: 82,436.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,644.72 : 103,140.80 = 59,661 : x
  2. Step 2: Convert to fraction form
    74,644.72/103,140.80 = 59,661/x
  3. Step 3: Cross multiply
    74,644.72x = 103,140.80 × 59,661
  4. Step 4: Simplify right side
    74,644.72x = 6,153,483,268.80
  5. Step 5: Solve for x
    x = 6,153,483,268.80/74,644.72
  6. Step 6: Final answer
    x = 82,436.95

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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.