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Finding the Fourth Proportional to 93,299.63, 128,674.24 and 78,834.67

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Solution

The fourth proportional to 93,299.63, 128,674.24 and 78,834.67 is: 108,724.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,299.63 : 128,674.24 = 78,834.67 : x
  2. Step 2: Convert to fraction form
    93,299.63/128,674.24 = 78,834.67/x
  3. Step 3: Cross multiply
    93,299.63x = 128,674.24 × 78,834.67
  4. Step 4: Simplify right side
    93,299.63x = 10,143,990,729.13
  5. Step 5: Solve for x
    x = 10,143,990,729.13/93,299.63
  6. Step 6: Final answer
    x = 108,724.88

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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.