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Finding the Fourth Proportional to 172,962.36, 238,677.72 and 100,359.64

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Solution

The fourth proportional to 172,962.36, 238,677.72 and 100,359.64 is: 138,490.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,962.36 : 238,677.72 = 100,359.64 : x
  2. Step 2: Convert to fraction form
    172,962.36/238,677.72 = 100,359.64/x
  3. Step 3: Cross multiply
    172,962.36x = 238,677.72 × 100,359.64
  4. Step 4: Simplify right side
    172,962.36x = 23,953,610,055.22
  5. Step 5: Solve for x
    x = 23,953,610,055.22/172,962.36
  6. Step 6: Final answer
    x = 138,490.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.