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Finding the Fourth Proportional to 319,691.76, 479,533.45 and 91,993.32

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Solution

The fourth proportional to 319,691.76, 479,533.45 and 91,993.32 is: 137,988.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,691.76 : 479,533.45 = 91,993.32 : x
  2. Step 2: Convert to fraction form
    319,691.76/479,533.45 = 91,993.32/x
  3. Step 3: Cross multiply
    319,691.76x = 479,533.45 × 91,993.32
  4. Step 4: Simplify right side
    319,691.76x = 44,113,874,116.55
  5. Step 5: Solve for x
    x = 44,113,874,116.55/319,691.76
  6. Step 6: Final answer
    x = 137,988.77

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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.