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Finding the Fourth Proportional to 74,468.10, 111,702.15 and 66,864.90

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Solution

The fourth proportional to 74,468.10, 111,702.15 and 66,864.90 is: 100,297.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,468.10 : 111,702.15 = 66,864.90 : x
  2. Step 2: Convert to fraction form
    74,468.10/111,702.15 = 66,864.90/x
  3. Step 3: Cross multiply
    74,468.10x = 111,702.15 × 66,864.90
  4. Step 4: Simplify right side
    74,468.10x = 7,468,953,089.54
  5. Step 5: Solve for x
    x = 7,468,953,089.54/74,468.10
  6. Step 6: Final answer
    x = 100,297.35

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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.