Home / 138,016.10-190,438.49-77,578.36

Finding the Fourth Proportional to 138,016.10, 190,438.49 and 77,578.36

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Solution

The fourth proportional to 138,016.10, 190,438.49 and 77,578.36 is: 107,044.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,016.10 : 190,438.49 = 77,578.36 : x
  2. Step 2: Convert to fraction form
    138,016.10/190,438.49 = 77,578.36/x
  3. Step 3: Cross multiply
    138,016.10x = 190,438.49 × 77,578.36
  4. Step 4: Simplify right side
    138,016.10x = 14,773,905,452.93
  5. Step 5: Solve for x
    x = 14,773,905,452.93/138,016.10
  6. Step 6: Final answer
    x = 107,044.80

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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.