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Finding the Fourth Proportional to 90,836, 125,370.96 and 51,092

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Solution

The fourth proportional to 90,836, 125,370.96 and 51,092 is: 70,516.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,836 : 125,370.96 = 51,092 : x
  2. Step 2: Convert to fraction form
    90,836/125,370.96 = 51,092/x
  3. Step 3: Cross multiply
    90,836x = 125,370.96 × 51,092
  4. Step 4: Simplify right side
    90,836x = 6,405,453,088.32
  5. Step 5: Solve for x
    x = 6,405,453,088.32/90,836
  6. Step 6: Final answer
    x = 70,516.68

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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.