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Finding the Fourth Proportional to 90,574.57, 135,883.20 and 89,068.38

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Solution

The fourth proportional to 90,574.57, 135,883.20 and 89,068.38 is: 133,623.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,574.57 : 135,883.20 = 89,068.38 : x
  2. Step 2: Convert to fraction form
    90,574.57/135,883.20 = 89,068.38/x
  3. Step 3: Cross multiply
    90,574.57x = 135,883.20 × 89,068.38
  4. Step 4: Simplify right side
    90,574.57x = 12,102,896,317.66
  5. Step 5: Solve for x
    x = 12,102,896,317.66/90,574.57
  6. Step 6: Final answer
    x = 133,623.56

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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.