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Finding the Fourth Proportional to 115,690.16, 159,648.36 and 65,388.08

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Solution

The fourth proportional to 115,690.16, 159,648.36 and 65,388.08 is: 90,233.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,690.16 : 159,648.36 = 65,388.08 : x
  2. Step 2: Convert to fraction form
    115,690.16/159,648.36 = 65,388.08/x
  3. Step 3: Cross multiply
    115,690.16x = 159,648.36 × 65,388.08
  4. Step 4: Simplify right side
    115,690.16x = 10,439,099,735.55
  5. Step 5: Solve for x
    x = 10,439,099,735.55/115,690.16
  6. Step 6: Final answer
    x = 90,233.26

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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.