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Finding the Fourth Proportional to 319,691.52, 479,533.08 and 91,993.08

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Solution

The fourth proportional to 319,691.52, 479,533.08 and 91,993.08 is: 137,988.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,691.52 : 479,533.08 = 91,993.08 : x
  2. Step 2: Convert to fraction form
    319,691.52/479,533.08 = 91,993.08/x
  3. Step 3: Cross multiply
    319,691.52x = 479,533.08 × 91,993.08
  4. Step 4: Simplify right side
    319,691.52x = 44,113,724,991.09
  5. Step 5: Solve for x
    x = 44,113,724,991.09/319,691.52
  6. Step 6: Final answer
    x = 137,988.41

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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.