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Finding the Fourth Proportional to 73,122.58, 100,902.90 and 42,078.83

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Solution

The fourth proportional to 73,122.58, 100,902.90 and 42,078.83 is: 58,065.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,122.58 : 100,902.90 = 42,078.83 : x
  2. Step 2: Convert to fraction form
    73,122.58/100,902.90 = 42,078.83/x
  3. Step 3: Cross multiply
    73,122.58x = 100,902.90 × 42,078.83
  4. Step 4: Simplify right side
    73,122.58x = 4,245,876,459.19
  5. Step 5: Solve for x
    x = 4,245,876,459.19/73,122.58
  6. Step 6: Final answer
    x = 58,065.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.