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Finding the Fourth Proportional to 328,100.10, 492,089.40 and 91,393.80

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Solution

The fourth proportional to 328,100.10, 492,089.40 and 91,393.80 is: 137,073.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,100.10 : 492,089.40 = 91,393.80 : x
  2. Step 2: Convert to fraction form
    328,100.10/492,089.40 = 91,393.80/x
  3. Step 3: Cross multiply
    328,100.10x = 492,089.40 × 91,393.80
  4. Step 4: Simplify right side
    328,100.10x = 44,973,920,205.72
  5. Step 5: Solve for x
    x = 44,973,920,205.72/328,100.10
  6. Step 6: Final answer
    x = 137,073.78

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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.