Home / 128,136.40-192,204.60-121,247.35

Finding the Fourth Proportional to 128,136.40, 192,204.60 and 121,247.35

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Solution

The fourth proportional to 128,136.40, 192,204.60 and 121,247.35 is: 181,871.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,136.40 : 192,204.60 = 121,247.35 : x
  2. Step 2: Convert to fraction form
    128,136.40/192,204.60 = 121,247.35/x
  3. Step 3: Cross multiply
    128,136.40x = 192,204.60 × 121,247.35
  4. Step 4: Simplify right side
    128,136.40x = 23,304,298,407.81
  5. Step 5: Solve for x
    x = 23,304,298,407.81/128,136.40
  6. Step 6: Final answer
    x = 181,871.03

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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.