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Finding the Fourth Proportional to 93,491.40, 139,908.72 and 80,500.68

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Solution

The fourth proportional to 93,491.40, 139,908.72 and 80,500.68 is: 120,468.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,491.40 : 139,908.72 = 80,500.68 : x
  2. Step 2: Convert to fraction form
    93,491.40/139,908.72 = 80,500.68/x
  3. Step 3: Cross multiply
    93,491.40x = 139,908.72 × 80,500.68
  4. Step 4: Simplify right side
    93,491.40x = 11,262,747,097.93
  5. Step 5: Solve for x
    x = 11,262,747,097.93/93,491.40
  6. Step 6: Final answer
    x = 120,468.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.