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Finding the Fourth Proportional to 208,259.90, 312,325.15 and 75,122.86

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Solution

The fourth proportional to 208,259.90, 312,325.15 and 75,122.86 is: 112,660.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,259.90 : 312,325.15 = 75,122.86 : x
  2. Step 2: Convert to fraction form
    208,259.90/312,325.15 = 75,122.86/x
  3. Step 3: Cross multiply
    208,259.90x = 312,325.15 × 75,122.86
  4. Step 4: Simplify right side
    208,259.90x = 23,462,758,517.93
  5. Step 5: Solve for x
    x = 23,462,758,517.93/208,259.90
  6. Step 6: Final answer
    x = 112,660.95

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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.