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Finding the Fourth Proportional to 212,834.99, 319,285.29 and 72,560.81

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Solution

The fourth proportional to 212,834.99, 319,285.29 and 72,560.81 is: 108,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,834.99 : 319,285.29 = 72,560.81 : x
  2. Step 2: Convert to fraction form
    212,834.99/319,285.29 = 72,560.81/x
  3. Step 3: Cross multiply
    212,834.99x = 319,285.29 × 72,560.81
  4. Step 4: Simplify right side
    212,834.99x = 23,167,600,333.80
  5. Step 5: Solve for x
    x = 23,167,600,333.80/212,834.99
  6. Step 6: Final answer
    x = 108,852.40

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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.