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Finding the Fourth Proportional to 161,751.38, 223,213.86 and 90,129.86

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Solution

The fourth proportional to 161,751.38, 223,213.86 and 90,129.86 is: 124,377.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,751.38 : 223,213.86 = 90,129.86 : x
  2. Step 2: Convert to fraction form
    161,751.38/223,213.86 = 90,129.86/x
  3. Step 3: Cross multiply
    161,751.38x = 223,213.86 × 90,129.86
  4. Step 4: Simplify right side
    161,751.38x = 20,118,233,951.86
  5. Step 5: Solve for x
    x = 20,118,233,951.86/161,751.38
  6. Step 6: Final answer
    x = 124,377.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.