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Finding the Fourth Proportional to 90,348.64, 124,743.36 and 69,090.88

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Solution

The fourth proportional to 90,348.64, 124,743.36 and 69,090.88 is: 95,393.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,348.64 : 124,743.36 = 69,090.88 : x
  2. Step 2: Convert to fraction form
    90,348.64/124,743.36 = 69,090.88/x
  3. Step 3: Cross multiply
    90,348.64x = 124,743.36 × 69,090.88
  4. Step 4: Simplify right side
    90,348.64x = 8,618,628,516.56
  5. Step 5: Solve for x
    x = 8,618,628,516.56/90,348.64
  6. Step 6: Final answer
    x = 95,393.01

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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.