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Finding the Fourth Proportional to 328,169.30, 492,056.91 and 128,251.37

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Solution

The fourth proportional to 328,169.30, 492,056.91 and 128,251.37 is: 192,300.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,169.30 : 492,056.91 = 128,251.37 : x
  2. Step 2: Convert to fraction form
    328,169.30/492,056.91 = 128,251.37/x
  3. Step 3: Cross multiply
    328,169.30x = 492,056.91 × 128,251.37
  4. Step 4: Simplify right side
    328,169.30x = 63,106,974,055.61
  5. Step 5: Solve for x
    x = 63,106,974,055.61/328,169.30
  6. Step 6: Final answer
    x = 192,300.06

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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.