Home / 100,453.61-138,627.69-55,135.82

Finding the Fourth Proportional to 100,453.61, 138,627.69 and 55,135.82

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Solution

The fourth proportional to 100,453.61, 138,627.69 and 55,135.82 is: 76,088.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,453.61 : 138,627.69 = 55,135.82 : x
  2. Step 2: Convert to fraction form
    100,453.61/138,627.69 = 55,135.82/x
  3. Step 3: Cross multiply
    100,453.61x = 138,627.69 × 55,135.82
  4. Step 4: Simplify right side
    100,453.61x = 7,643,350,669.72
  5. Step 5: Solve for x
    x = 7,643,350,669.72/100,453.61
  6. Step 6: Final answer
    x = 76,088.37

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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.