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Finding the Fourth Proportional to 90,338.88, 135,508.40 and 37,719.68

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Solution

The fourth proportional to 90,338.88, 135,508.40 and 37,719.68 is: 56,579.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,338.88 : 135,508.40 = 37,719.68 : x
  2. Step 2: Convert to fraction form
    90,338.88/135,508.40 = 37,719.68/x
  3. Step 3: Cross multiply
    90,338.88x = 135,508.40 × 37,719.68
  4. Step 4: Simplify right side
    90,338.88x = 5,111,333,485.31
  5. Step 5: Solve for x
    x = 5,111,333,485.31/90,338.88
  6. Step 6: Final answer
    x = 56,579.55

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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.