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Finding the Fourth Proportional to 208,415.58, 312,559.53 and 75,279.42

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Solution

The fourth proportional to 208,415.58, 312,559.53 and 75,279.42 is: 112,896.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,415.58 : 312,559.53 = 75,279.42 : x
  2. Step 2: Convert to fraction form
    208,415.58/312,559.53 = 75,279.42/x
  3. Step 3: Cross multiply
    208,415.58x = 312,559.53 × 75,279.42
  4. Step 4: Simplify right side
    208,415.58x = 23,529,300,133.87
  5. Step 5: Solve for x
    x = 23,529,300,133.87/208,415.58
  6. Step 6: Final answer
    x = 112,896.07

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1.5x scale

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.