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Finding the Fourth Proportional to 91,246, 125,919.54 and 51,502

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Solution

The fourth proportional to 91,246, 125,919.54 and 51,502 is: 71,072.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,246 : 125,919.54 = 51,502 : x
  2. Step 2: Convert to fraction form
    91,246/125,919.54 = 51,502/x
  3. Step 3: Cross multiply
    91,246x = 125,919.54 × 51,502
  4. Step 4: Simplify right side
    91,246x = 6,485,108,149.08
  5. Step 5: Solve for x
    x = 6,485,108,149.08/91,246
  6. Step 6: Final answer
    x = 71,072.79

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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.