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Finding the Fourth Proportional to 328,492.14, 492,738.21 and 79,174.14

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Solution

The fourth proportional to 328,492.14, 492,738.21 and 79,174.14 is: 118,761.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,492.14 : 492,738.21 = 79,174.14 : x
  2. Step 2: Convert to fraction form
    328,492.14/492,738.21 = 79,174.14/x
  3. Step 3: Cross multiply
    328,492.14x = 492,738.21 × 79,174.14
  4. Step 4: Simplify right side
    328,492.14x = 39,012,124,021.89
  5. Step 5: Solve for x
    x = 39,012,124,021.89/328,492.14
  6. Step 6: Final answer
    x = 118,761.21

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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.