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Finding the Fourth Proportional to 100,808.74, 139,093.74 and 58,342.67

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Solution

The fourth proportional to 100,808.74, 139,093.74 and 58,342.67 is: 80,499.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,808.74 : 139,093.74 = 58,342.67 : x
  2. Step 2: Convert to fraction form
    100,808.74/139,093.74 = 58,342.67/x
  3. Step 3: Cross multiply
    100,808.74x = 139,093.74 × 58,342.67
  4. Step 4: Simplify right side
    100,808.74x = 8,115,100,171.89
  5. Step 5: Solve for x
    x = 8,115,100,171.89/100,808.74
  6. Step 6: Final answer
    x = 80,499.97

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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.