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Finding the Fourth Proportional to 318,721.87, 478,134.73 and 94,105.01

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Solution

The fourth proportional to 318,721.87, 478,134.73 and 94,105.01 is: 141,172.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,721.87 : 478,134.73 = 94,105.01 : x
  2. Step 2: Convert to fraction form
    318,721.87/478,134.73 = 94,105.01/x
  3. Step 3: Cross multiply
    318,721.87x = 478,134.73 × 94,105.01
  4. Step 4: Simplify right side
    318,721.87x = 44,994,872,975.50
  5. Step 5: Solve for x
    x = 44,994,872,975.50/318,721.87
  6. Step 6: Final answer
    x = 141,172.85

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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.