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Finding the Fourth Proportional to 91,290.27, 125,979.72 and 51,010.98

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Solution

The fourth proportional to 91,290.27, 125,979.72 and 51,010.98 is: 70,394.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,290.27 : 125,979.72 = 51,010.98 : x
  2. Step 2: Convert to fraction form
    91,290.27/125,979.72 = 51,010.98/x
  3. Step 3: Cross multiply
    91,290.27x = 125,979.72 × 51,010.98
  4. Step 4: Simplify right side
    91,290.27x = 6,426,348,977.33
  5. Step 5: Solve for x
    x = 6,426,348,977.33/91,290.27
  6. Step 6: Final answer
    x = 70,394.68

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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.