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Finding the Fourth Proportional to 188,115.72, 259,602.86 and 103,240.68

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Solution

The fourth proportional to 188,115.72, 259,602.86 and 103,240.68 is: 142,473.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,115.72 : 259,602.86 = 103,240.68 : x
  2. Step 2: Convert to fraction form
    188,115.72/259,602.86 = 103,240.68/x
  3. Step 3: Cross multiply
    188,115.72x = 259,602.86 × 103,240.68
  4. Step 4: Simplify right side
    188,115.72x = 26,801,575,796.34
  5. Step 5: Solve for x
    x = 26,801,575,796.34/188,115.72
  6. Step 6: Final answer
    x = 142,473.88

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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.