Home / 100,077.90-138,106.26-54,755.31

Finding the Fourth Proportional to 100,077.90, 138,106.26 and 54,755.31

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Solution

The fourth proportional to 100,077.90, 138,106.26 and 54,755.31 is: 75,561.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,077.90 : 138,106.26 = 54,755.31 : x
  2. Step 2: Convert to fraction form
    100,077.90/138,106.26 = 54,755.31/x
  3. Step 3: Cross multiply
    100,077.90x = 138,106.26 × 54,755.31
  4. Step 4: Simplify right side
    100,077.90x = 7,562,051,079.24
  5. Step 5: Solve for x
    x = 7,562,051,079.24/100,077.90
  6. Step 6: Final answer
    x = 75,561.65

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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.