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Finding the Fourth Proportional to 81,503.93, 122,338.89 and 56,205.07

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Solution

The fourth proportional to 81,503.93, 122,338.89 and 56,205.07 is: 84,364.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,503.93 : 122,338.89 = 56,205.07 : x
  2. Step 2: Convert to fraction form
    81,503.93/122,338.89 = 56,205.07/x
  3. Step 3: Cross multiply
    81,503.93x = 122,338.89 × 56,205.07
  4. Step 4: Simplify right side
    81,503.93x = 6,876,065,570.33
  5. Step 5: Solve for x
    x = 6,876,065,570.33/81,503.93
  6. Step 6: Final answer
    x = 84,364.83

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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.