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Finding the Fourth Proportional to 171,435.52, 257,054.76 and 91,374.88

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Solution

The fourth proportional to 171,435.52, 257,054.76 and 91,374.88 is: 137,009.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,435.52 : 257,054.76 = 91,374.88 : x
  2. Step 2: Convert to fraction form
    171,435.52/257,054.76 = 91,374.88/x
  3. Step 3: Cross multiply
    171,435.52x = 257,054.76 × 91,374.88
  4. Step 4: Simplify right side
    171,435.52x = 23,488,347,848.43
  5. Step 5: Solve for x
    x = 23,488,347,848.43/171,435.52
  6. Step 6: Final answer
    x = 137,009.81

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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.