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Finding the Fourth Proportional to 90,020.52, 135,030.78 and 58,881.96

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Solution

The fourth proportional to 90,020.52, 135,030.78 and 58,881.96 is: 88,322.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,020.52 : 135,030.78 = 58,881.96 : x
  2. Step 2: Convert to fraction form
    90,020.52/135,030.78 = 58,881.96/x
  3. Step 3: Cross multiply
    90,020.52x = 135,030.78 × 58,881.96
  4. Step 4: Simplify right side
    90,020.52x = 7,950,876,986.73
  5. Step 5: Solve for x
    x = 7,950,876,986.73/90,020.52
  6. Step 6: Final answer
    x = 88,322.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.