Home / 131,421.33-181,336.05-80,445.60

Finding the Fourth Proportional to 131,421.33, 181,336.05 and 80,445.60

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Solution

The fourth proportional to 131,421.33, 181,336.05 and 80,445.60 is: 110,999.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,421.33 : 181,336.05 = 80,445.60 : x
  2. Step 2: Convert to fraction form
    131,421.33/181,336.05 = 80,445.60/x
  3. Step 3: Cross multiply
    131,421.33x = 181,336.05 × 80,445.60
  4. Step 4: Simplify right side
    131,421.33x = 14,587,687,343.88
  5. Step 5: Solve for x
    x = 14,587,687,343.88/131,421.33
  6. Step 6: Final answer
    x = 110,999.39

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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.