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Finding the Fourth Proportional to 100,013.00, 138,012.33 and 54,681.95

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Solution

The fourth proportional to 100,013.00, 138,012.33 and 54,681.95 is: 75,458.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,013.00 : 138,012.33 = 54,681.95 : x
  2. Step 2: Convert to fraction form
    100,013.00/138,012.33 = 54,681.95/x
  3. Step 3: Cross multiply
    100,013.00x = 138,012.33 × 54,681.95
  4. Step 4: Simplify right side
    100,013.00x = 7,546,783,878.53
  5. Step 5: Solve for x
    x = 7,546,783,878.53/100,013.00
  6. Step 6: Final answer
    x = 75,458.03

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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.