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Finding the Fourth Proportional to 99,333, 137,079.54 and 54,621

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Solution

The fourth proportional to 99,333, 137,079.54 and 54,621 is: 75,376.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,333 : 137,079.54 = 54,621 : x
  2. Step 2: Convert to fraction form
    99,333/137,079.54 = 54,621/x
  3. Step 3: Cross multiply
    99,333x = 137,079.54 × 54,621
  4. Step 4: Simplify right side
    99,333x = 7,487,421,554.34
  5. Step 5: Solve for x
    x = 7,487,421,554.34/99,333
  6. Step 6: Final answer
    x = 75,376.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.