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Finding the Fourth Proportional to 135,344.64, 186,775.96 and 74,919.45

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Solution

The fourth proportional to 135,344.64, 186,775.96 and 74,919.45 is: 103,389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,344.64 : 186,775.96 = 74,919.45 : x
  2. Step 2: Convert to fraction form
    135,344.64/186,775.96 = 74,919.45/x
  3. Step 3: Cross multiply
    135,344.64x = 186,775.96 × 74,919.45
  4. Step 4: Simplify right side
    135,344.64x = 13,993,152,196.42
  5. Step 5: Solve for x
    x = 13,993,152,196.42/135,344.64
  6. Step 6: Final answer
    x = 103,389.04

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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.