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Finding the Fourth Proportional to 92,864, 128,090.72 and 62,238

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Solution

The fourth proportional to 92,864, 128,090.72 and 62,238 is: 85,847.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,864 : 128,090.72 = 62,238 : x
  2. Step 2: Convert to fraction form
    92,864/128,090.72 = 62,238/x
  3. Step 3: Cross multiply
    92,864x = 128,090.72 × 62,238
  4. Step 4: Simplify right side
    92,864x = 7,972,110,231.36
  5. Step 5: Solve for x
    x = 7,972,110,231.36/92,864
  6. Step 6: Final answer
    x = 85,847.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.