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Finding the Fourth Proportional to 101,439.73, 139,942.81 and 61,130.58

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Solution

The fourth proportional to 101,439.73, 139,942.81 and 61,130.58 is: 84,333.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,439.73 : 139,942.81 = 61,130.58 : x
  2. Step 2: Convert to fraction form
    101,439.73/139,942.81 = 61,130.58/x
  3. Step 3: Cross multiply
    101,439.73x = 139,942.81 × 61,130.58
  4. Step 4: Simplify right side
    101,439.73x = 8,554,785,491.99
  5. Step 5: Solve for x
    x = 8,554,785,491.99/101,439.73
  6. Step 6: Final answer
    x = 84,333.68

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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.