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Finding the Fourth Proportional to 309,180.69, 463,696.40 and 129,168.86

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Solution

The fourth proportional to 309,180.69, 463,696.40 and 129,168.86 is: 193,722.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,180.69 : 463,696.40 = 129,168.86 : x
  2. Step 2: Convert to fraction form
    309,180.69/463,696.40 = 129,168.86/x
  3. Step 3: Cross multiply
    309,180.69x = 463,696.40 × 129,168.86
  4. Step 4: Simplify right side
    309,180.69x = 59,895,132,409.78
  5. Step 5: Solve for x
    x = 59,895,132,409.78/309,180.69
  6. Step 6: Final answer
    x = 193,722.10

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1.5x scale

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.