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Finding the Fourth Proportional to 278,683.84, 418,136.52 and 89,173.40

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Solution

The fourth proportional to 278,683.84, 418,136.52 and 89,173.40 is: 133,795.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,683.84 : 418,136.52 = 89,173.40 : x
  2. Step 2: Convert to fraction form
    278,683.84/418,136.52 = 89,173.40/x
  3. Step 3: Cross multiply
    278,683.84x = 418,136.52 × 89,173.40
  4. Step 4: Simplify right side
    278,683.84x = 37,286,655,152.57
  5. Step 5: Solve for x
    x = 37,286,655,152.57/278,683.84
  6. Step 6: Final answer
    x = 133,795.54

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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.