Home / 279,733.10-419,522.76-77,280.75

Finding the Fourth Proportional to 279,733.10, 419,522.76 and 77,280.75

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Solution

The fourth proportional to 279,733.10, 419,522.76 and 77,280.75 is: 115,899.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,733.10 : 419,522.76 = 77,280.75 : x
  2. Step 2: Convert to fraction form
    279,733.10/419,522.76 = 77,280.75/x
  3. Step 3: Cross multiply
    279,733.10x = 419,522.76 × 77,280.75
  4. Step 4: Simplify right side
    279,733.10x = 32,421,033,534.87
  5. Step 5: Solve for x
    x = 32,421,033,534.87/279,733.10
  6. Step 6: Final answer
    x = 115,899.88

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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.