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Finding the Fourth Proportional to 74,374.72, 102,007.84 and 65,976.64

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Solution

The fourth proportional to 74,374.72, 102,007.84 and 65,976.64 is: 90,489.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,374.72 : 102,007.84 = 65,976.64 : x
  2. Step 2: Convert to fraction form
    74,374.72/102,007.84 = 65,976.64/x
  3. Step 3: Cross multiply
    74,374.72x = 102,007.84 × 65,976.64
  4. Step 4: Simplify right side
    74,374.72x = 6,730,134,536.86
  5. Step 5: Solve for x
    x = 6,730,134,536.86/74,374.72
  6. Step 6: Final answer
    x = 90,489.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.