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Finding the Fourth Proportional to 100,898.94, 139,239.27 and 55,576.02

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Solution

The fourth proportional to 100,898.94, 139,239.27 and 55,576.02 is: 76,694.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,898.94 : 139,239.27 = 55,576.02 : x
  2. Step 2: Convert to fraction form
    100,898.94/139,239.27 = 55,576.02/x
  3. Step 3: Cross multiply
    100,898.94x = 139,239.27 × 55,576.02
  4. Step 4: Simplify right side
    100,898.94x = 7,738,364,454.31
  5. Step 5: Solve for x
    x = 7,738,364,454.31/100,898.94
  6. Step 6: Final answer
    x = 76,694.21

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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.