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Finding the Fourth Proportional to 100,522.43, 151,489.62 and 90,539.69

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Solution

The fourth proportional to 100,522.43, 151,489.62 and 90,539.69 is: 136,445.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,522.43 : 151,489.62 = 90,539.69 : x
  2. Step 2: Convert to fraction form
    100,522.43/151,489.62 = 90,539.69/x
  3. Step 3: Cross multiply
    100,522.43x = 151,489.62 × 90,539.69
  4. Step 4: Simplify right side
    100,522.43x = 13,715,823,233.02
  5. Step 5: Solve for x
    x = 13,715,823,233.02/100,522.43
  6. Step 6: Final answer
    x = 136,445.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.