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Finding the Fourth Proportional to 289,512.48, 434,274.72 and 79,149.12

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Solution

The fourth proportional to 289,512.48, 434,274.72 and 79,149.12 is: 118,725.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,512.48 : 434,274.72 = 79,149.12 : x
  2. Step 2: Convert to fraction form
    289,512.48/434,274.72 = 79,149.12/x
  3. Step 3: Cross multiply
    289,512.48x = 434,274.72 × 79,149.12
  4. Step 4: Simplify right side
    289,512.48x = 34,372,461,926.25
  5. Step 5: Solve for x
    x = 34,372,461,926.25/289,512.48
  6. Step 6: Final answer
    x = 118,725.32

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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.