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Finding the Fourth Proportional to 74,296.64, 111,442.08 and 18,894.08

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Solution

The fourth proportional to 74,296.64, 111,442.08 and 18,894.08 is: 28,340.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,296.64 : 111,442.08 = 18,894.08 : x
  2. Step 2: Convert to fraction form
    74,296.64/111,442.08 = 18,894.08/x
  3. Step 3: Cross multiply
    74,296.64x = 111,442.08 × 18,894.08
  4. Step 4: Simplify right side
    74,296.64x = 2,105,595,574.89
  5. Step 5: Solve for x
    x = 2,105,595,574.89/74,296.64
  6. Step 6: Final answer
    x = 28,340.39

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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.