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Finding the Fourth Proportional to 207,423, 311,134.50 and 59,679

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Solution

The fourth proportional to 207,423, 311,134.50 and 59,679 is: 89,518.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,423 : 311,134.50 = 59,679 : x
  2. Step 2: Convert to fraction form
    207,423/311,134.50 = 59,679/x
  3. Step 3: Cross multiply
    207,423x = 311,134.50 × 59,679
  4. Step 4: Simplify right side
    207,423x = 18,568,195,825.50
  5. Step 5: Solve for x
    x = 18,568,195,825.50/207,423
  6. Step 6: Final answer
    x = 89,518.50

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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.