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Finding the Fourth Proportional to 221,062.65, 331,354.05 and 145,129.33

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Solution

The fourth proportional to 221,062.65, 331,354.05 and 145,129.33 is: 217,536.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,062.65 : 331,354.05 = 145,129.33 : x
  2. Step 2: Convert to fraction form
    221,062.65/331,354.05 = 145,129.33/x
  3. Step 3: Cross multiply
    221,062.65x = 331,354.05 × 145,129.33
  4. Step 4: Simplify right side
    221,062.65x = 48,089,190,615.49
  5. Step 5: Solve for x
    x = 48,089,190,615.49/221,062.65
  6. Step 6: Final answer
    x = 217,536.48

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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.