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Finding the Fourth Proportional to 136,495.20, 204,872.40 and 84,007.20

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Solution

The fourth proportional to 136,495.20, 204,872.40 and 84,007.20 is: 126,090.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,495.20 : 204,872.40 = 84,007.20 : x
  2. Step 2: Convert to fraction form
    136,495.20/204,872.40 = 84,007.20/x
  3. Step 3: Cross multiply
    136,495.20x = 204,872.40 × 84,007.20
  4. Step 4: Simplify right side
    136,495.20x = 17,210,756,681.28
  5. Step 5: Solve for x
    x = 17,210,756,681.28/136,495.20
  6. Step 6: Final answer
    x = 126,090.56

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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.