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Finding the Fourth Proportional to 330,702.75, 496,054.13 and 81,384.75

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Solution

The fourth proportional to 330,702.75, 496,054.13 and 81,384.75 is: 122,077.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,702.75 : 496,054.13 = 81,384.75 : x
  2. Step 2: Convert to fraction form
    330,702.75/496,054.13 = 81,384.75/x
  3. Step 3: Cross multiply
    330,702.75x = 496,054.13 × 81,384.75
  4. Step 4: Simplify right side
    330,702.75x = 40,371,240,949.59
  5. Step 5: Solve for x
    x = 40,371,240,949.59/330,702.75
  6. Step 6: Final answer
    x = 122,077.13

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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.