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Finding the Fourth Proportional to 61,039.20, 91,616.40 and 37,711.20

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Solution

The fourth proportional to 61,039.20, 91,616.40 and 37,711.20 is: 56,602.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,039.20 : 91,616.40 = 37,711.20 : x
  2. Step 2: Convert to fraction form
    61,039.20/91,616.40 = 37,711.20/x
  3. Step 3: Cross multiply
    61,039.20x = 91,616.40 × 37,711.20
  4. Step 4: Simplify right side
    61,039.20x = 3,454,964,383.68
  5. Step 5: Solve for x
    x = 3,454,964,383.68/61,039.20
  6. Step 6: Final answer
    x = 56,602.39

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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.