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Finding the Fourth Proportional to 253,319.27, 379,978.59 and 120,126.86

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Solution

The fourth proportional to 253,319.27, 379,978.59 and 120,126.86 is: 180,190.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,319.27 : 379,978.59 = 120,126.86 : x
  2. Step 2: Convert to fraction form
    253,319.27/379,978.59 = 120,126.86/x
  3. Step 3: Cross multiply
    253,319.27x = 379,978.59 × 120,126.86
  4. Step 4: Simplify right side
    253,319.27x = 45,645,632,984.03
  5. Step 5: Solve for x
    x = 45,645,632,984.03/253,319.27
  6. Step 6: Final answer
    x = 180,190.14

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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.