Home / 217,409.40-326,114.10-111,121.20

Finding the Fourth Proportional to 217,409.40, 326,114.10 and 111,121.20

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Solution

The fourth proportional to 217,409.40, 326,114.10 and 111,121.20 is: 166,681.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,409.40 : 326,114.10 = 111,121.20 : x
  2. Step 2: Convert to fraction form
    217,409.40/326,114.10 = 111,121.20/x
  3. Step 3: Cross multiply
    217,409.40x = 326,114.10 × 111,121.20
  4. Step 4: Simplify right side
    217,409.40x = 36,238,190,128.92
  5. Step 5: Solve for x
    x = 36,238,190,128.92/217,409.40
  6. Step 6: Final answer
    x = 166,681.80

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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.