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Finding the Fourth Proportional to 74,919.60, 112,395.81 and 28,172.48

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Solution

The fourth proportional to 74,919.60, 112,395.81 and 28,172.48 is: 42,264.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,919.60 : 112,395.81 = 28,172.48 : x
  2. Step 2: Convert to fraction form
    74,919.60/112,395.81 = 28,172.48/x
  3. Step 3: Cross multiply
    74,919.60x = 112,395.81 × 28,172.48
  4. Step 4: Simplify right side
    74,919.60x = 3,166,468,709.31
  5. Step 5: Solve for x
    x = 3,166,468,709.31/74,919.60
  6. Step 6: Final answer
    x = 42,264.89

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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.