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Finding the Fourth Proportional to 342,152.58, 513,195.89 and 105,431.70

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Solution

The fourth proportional to 342,152.58, 513,195.89 and 105,431.70 is: 158,137.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,152.58 : 513,195.89 = 105,431.70 : x
  2. Step 2: Convert to fraction form
    342,152.58/513,195.89 = 105,431.70/x
  3. Step 3: Cross multiply
    342,152.58x = 513,195.89 × 105,431.70
  4. Step 4: Simplify right side
    342,152.58x = 54,107,114,588.55
  5. Step 5: Solve for x
    x = 54,107,114,588.55/342,152.58
  6. Step 6: Final answer
    x = 158,137.39

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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.