Home / 121,108.10-181,770.15-71,125.70

Finding the Fourth Proportional to 121,108.10, 181,770.15 and 71,125.70

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Solution

The fourth proportional to 121,108.10, 181,770.15 and 71,125.70 is: 106,751.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,108.10 : 181,770.15 = 71,125.70 : x
  2. Step 2: Convert to fraction form
    121,108.10/181,770.15 = 71,125.70/x
  3. Step 3: Cross multiply
    121,108.10x = 181,770.15 × 71,125.70
  4. Step 4: Simplify right side
    121,108.10x = 12,928,529,157.86
  5. Step 5: Solve for x
    x = 12,928,529,157.86/121,108.10
  6. Step 6: Final answer
    x = 106,751.98

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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.