Home / 131,511.89-181,485.20-80,613.11

Finding the Fourth Proportional to 131,511.89, 181,485.20 and 80,613.11

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Solution

The fourth proportional to 131,511.89, 181,485.20 and 80,613.11 is: 111,245.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,511.89 : 181,485.20 = 80,613.11 : x
  2. Step 2: Convert to fraction form
    131,511.89/181,485.20 = 80,613.11/x
  3. Step 3: Cross multiply
    131,511.89x = 181,485.20 × 80,613.11
  4. Step 4: Simplify right side
    131,511.89x = 14,630,085,080.48
  5. Step 5: Solve for x
    x = 14,630,085,080.48/131,511.89
  6. Step 6: Final answer
    x = 111,245.35

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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.