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Finding the Fourth Proportional to 74,653.10, 111,979.65 and 74,134.70

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Solution

The fourth proportional to 74,653.10, 111,979.65 and 74,134.70 is: 111,202.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,653.10 : 111,979.65 = 74,134.70 : x
  2. Step 2: Convert to fraction form
    74,653.10/111,979.65 = 74,134.70/x
  3. Step 3: Cross multiply
    74,653.10x = 111,979.65 × 74,134.70
  4. Step 4: Simplify right side
    74,653.10x = 8,301,577,758.86
  5. Step 5: Solve for x
    x = 8,301,577,758.86/74,653.10
  6. Step 6: Final answer
    x = 111,202.05

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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.