Home / 78,677.28-108,540.11-53,174.36

Finding the Fourth Proportional to 78,677.28, 108,540.11 and 53,174.36

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Solution

The fourth proportional to 78,677.28, 108,540.11 and 53,174.36 is: 73,357.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,677.28 : 108,540.11 = 53,174.36 : x
  2. Step 2: Convert to fraction form
    78,677.28/108,540.11 = 53,174.36/x
  3. Step 3: Cross multiply
    78,677.28x = 108,540.11 × 53,174.36
  4. Step 4: Simplify right side
    78,677.28x = 5,771,550,075.01
  5. Step 5: Solve for x
    x = 5,771,550,075.01/78,677.28
  6. Step 6: Final answer
    x = 73,357.26

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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.