Home / 100,278.90-138,385.26-57,837.60

Finding the Fourth Proportional to 100,278.90, 138,385.26 and 57,837.60

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Solution

The fourth proportional to 100,278.90, 138,385.26 and 57,837.60 is: 79,816.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,278.90 : 138,385.26 = 57,837.60 : x
  2. Step 2: Convert to fraction form
    100,278.90/138,385.26 = 57,837.60/x
  3. Step 3: Cross multiply
    100,278.90x = 138,385.26 × 57,837.60
  4. Step 4: Simplify right side
    100,278.90x = 8,003,871,313.78
  5. Step 5: Solve for x
    x = 8,003,871,313.78/100,278.90
  6. Step 6: Final answer
    x = 79,816.11

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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.