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Finding the Fourth Proportional to 90,583.84, 134,957.48 and 86,122.48

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Solution

The fourth proportional to 90,583.84, 134,957.48 and 86,122.48 is: 128,310.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,583.84 : 134,957.48 = 86,122.48 : x
  2. Step 2: Convert to fraction form
    90,583.84/134,957.48 = 86,122.48/x
  3. Step 3: Cross multiply
    90,583.84x = 134,957.48 × 86,122.48
  4. Step 4: Simplify right side
    90,583.84x = 11,622,872,872.15
  5. Step 5: Solve for x
    x = 11,622,872,872.15/90,583.84
  6. Step 6: Final answer
    x = 128,310.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.