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Finding the Fourth Proportional to 61,028.64, 91,418.22 and 45,251.46

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Solution

The fourth proportional to 61,028.64, 91,418.22 and 45,251.46 is: 67,784.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,028.64 : 91,418.22 = 45,251.46 : x
  2. Step 2: Convert to fraction form
    61,028.64/91,418.22 = 45,251.46/x
  3. Step 3: Cross multiply
    61,028.64x = 91,418.22 × 45,251.46
  4. Step 4: Simplify right side
    61,028.64x = 4,136,807,925.60
  5. Step 5: Solve for x
    x = 4,136,807,925.60/61,028.64
  6. Step 6: Final answer
    x = 67,784.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.