Home / 100,006.47-138,013.22-54,681.75

Finding the Fourth Proportional to 100,006.47, 138,013.22 and 54,681.75

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Solution

The fourth proportional to 100,006.47, 138,013.22 and 54,681.75 is: 75,463.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,006.47 : 138,013.22 = 54,681.75 : x
  2. Step 2: Convert to fraction form
    100,006.47/138,013.22 = 54,681.75/x
  3. Step 3: Cross multiply
    100,006.47x = 138,013.22 × 54,681.75
  4. Step 4: Simplify right side
    100,006.47x = 7,546,804,119.33
  5. Step 5: Solve for x
    x = 7,546,804,119.33/100,006.47
  6. Step 6: Final answer
    x = 75,463.16

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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.