Home / 121,202.10-181,803.15-79,211.70

Finding the Fourth Proportional to 121,202.10, 181,803.15 and 79,211.70

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Solution

The fourth proportional to 121,202.10, 181,803.15 and 79,211.70 is: 118,817.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,202.10 : 181,803.15 = 79,211.70 : x
  2. Step 2: Convert to fraction form
    121,202.10/181,803.15 = 79,211.70/x
  3. Step 3: Cross multiply
    121,202.10x = 181,803.15 × 79,211.70
  4. Step 4: Simplify right side
    121,202.10x = 14,400,936,576.86
  5. Step 5: Solve for x
    x = 14,400,936,576.86/121,202.10
  6. Step 6: Final answer
    x = 118,817.55

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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.