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Finding the Fourth Proportional to 100,381.37, 138,525.91 and 62,133.30

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Solution

The fourth proportional to 100,381.37, 138,525.91 and 62,133.30 is: 85,743.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,381.37 : 138,525.91 = 62,133.30 : x
  2. Step 2: Convert to fraction form
    100,381.37/138,525.91 = 62,133.30/x
  3. Step 3: Cross multiply
    100,381.37x = 138,525.91 × 62,133.30
  4. Step 4: Simplify right side
    100,381.37x = 8,607,071,075.84
  5. Step 5: Solve for x
    x = 8,607,071,075.84/100,381.37
  6. Step 6: Final answer
    x = 85,743.71

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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.