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Finding the Fourth Proportional to 172,723.31, 238,358.65 and 100,140.31

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Solution

The fourth proportional to 172,723.31, 238,358.65 and 100,140.31 is: 138,193.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,723.31 : 238,358.65 = 100,140.31 : x
  2. Step 2: Convert to fraction form
    172,723.31/238,358.65 = 100,140.31/x
  3. Step 3: Cross multiply
    172,723.31x = 238,358.65 × 100,140.31
  4. Step 4: Simplify right side
    172,723.31x = 23,869,308,333.51
  5. Step 5: Solve for x
    x = 23,869,308,333.51/172,723.31
  6. Step 6: Final answer
    x = 138,193.90

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1.5x scale

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.