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Finding the Fourth Proportional to 136,695.20, 204,812.40 and 66,423.20

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Solution

The fourth proportional to 136,695.20, 204,812.40 and 66,423.20 is: 99,522.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,695.20 : 204,812.40 = 66,423.20 : x
  2. Step 2: Convert to fraction form
    136,695.20/204,812.40 = 66,423.20/x
  3. Step 3: Cross multiply
    136,695.20x = 204,812.40 × 66,423.20
  4. Step 4: Simplify right side
    136,695.20x = 13,604,295,007.68
  5. Step 5: Solve for x
    x = 13,604,295,007.68/136,695.20
  6. Step 6: Final answer
    x = 99,522.84

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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.