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Finding the Fourth Proportional to 211,090.96, 316,634.46 and 91,232.66

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Solution

The fourth proportional to 211,090.96, 316,634.46 and 91,232.66 is: 136,848.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,090.96 : 316,634.46 = 91,232.66 : x
  2. Step 2: Convert to fraction form
    211,090.96/316,634.46 = 91,232.66/x
  3. Step 3: Cross multiply
    211,090.96x = 316,634.46 × 91,232.66
  4. Step 4: Simplify right side
    211,090.96x = 28,887,404,482.93
  5. Step 5: Solve for x
    x = 28,887,404,482.93/211,090.96
  6. Step 6: Final answer
    x = 136,848.14

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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.