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Finding the Fourth Proportional to 90,135.66, 124,396.43 and 51,896.64

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Solution

The fourth proportional to 90,135.66, 124,396.43 and 51,896.64 is: 71,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,135.66 : 124,396.43 = 51,896.64 : x
  2. Step 2: Convert to fraction form
    90,135.66/124,396.43 = 51,896.64/x
  3. Step 3: Cross multiply
    90,135.66x = 124,396.43 × 51,896.64
  4. Step 4: Simplify right side
    90,135.66x = 6,455,756,485.51
  5. Step 5: Solve for x
    x = 6,455,756,485.51/90,135.66
  6. Step 6: Final answer
    x = 71,622.67

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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.