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Finding the Fourth Proportional to 268,120.80, 402,440.40 and 135,151.20

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Solution

The fourth proportional to 268,120.80, 402,440.40 and 135,151.20 is: 202,857.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,120.80 : 402,440.40 = 135,151.20 : x
  2. Step 2: Convert to fraction form
    268,120.80/402,440.40 = 135,151.20/x
  3. Step 3: Cross multiply
    268,120.80x = 402,440.40 × 135,151.20
  4. Step 4: Simplify right side
    268,120.80x = 54,390,302,988.48
  5. Step 5: Solve for x
    x = 54,390,302,988.48/268,120.80
  6. Step 6: Final answer
    x = 202,857.45

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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.