Home / 100,942.66-139,360.65-89,733.67

Finding the Fourth Proportional to 100,942.66, 139,360.65 and 89,733.67

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Solution

The fourth proportional to 100,942.66, 139,360.65 and 89,733.67 is: 123,885.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,942.66 : 139,360.65 = 89,733.67 : x
  2. Step 2: Convert to fraction form
    100,942.66/139,360.65 = 89,733.67/x
  3. Step 3: Cross multiply
    100,942.66x = 139,360.65 × 89,733.67
  4. Step 4: Simplify right side
    100,942.66x = 12,505,343,181.84
  5. Step 5: Solve for x
    x = 12,505,343,181.84/100,942.66
  6. Step 6: Final answer
    x = 123,885.62

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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.