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Finding the Fourth Proportional to 93,311.10, 128,768.67 and 53,021.70

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Solution

The fourth proportional to 93,311.10, 128,768.67 and 53,021.70 is: 73,169.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,311.10 : 128,768.67 = 53,021.70 : x
  2. Step 2: Convert to fraction form
    93,311.10/128,768.67 = 53,021.70/x
  3. Step 3: Cross multiply
    93,311.10x = 128,768.67 × 53,021.70
  4. Step 4: Simplify right side
    93,311.10x = 6,827,533,790.14
  5. Step 5: Solve for x
    x = 6,827,533,790.14/93,311.10
  6. Step 6: Final answer
    x = 73,169.58

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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.