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Finding the Fourth Proportional to 289,757.52, 434,697.84 and 90,073.08

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Solution

The fourth proportional to 289,757.52, 434,697.84 and 90,073.08 is: 135,128.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,757.52 : 434,697.84 = 90,073.08 : x
  2. Step 2: Convert to fraction form
    289,757.52/434,697.84 = 90,073.08/x
  3. Step 3: Cross multiply
    289,757.52x = 434,697.84 × 90,073.08
  4. Step 4: Simplify right side
    289,757.52x = 39,154,573,318.15
  5. Step 5: Solve for x
    x = 39,154,573,318.15/289,757.52
  6. Step 6: Final answer
    x = 135,128.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.