Home / 81,219.36-112,020.66-69,907.80

Finding the Fourth Proportional to 81,219.36, 112,020.66 and 69,907.80

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Solution

The fourth proportional to 81,219.36, 112,020.66 and 69,907.80 is: 96,419.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,219.36 : 112,020.66 = 69,907.80 : x
  2. Step 2: Convert to fraction form
    81,219.36/112,020.66 = 69,907.80/x
  3. Step 3: Cross multiply
    81,219.36x = 112,020.66 × 69,907.80
  4. Step 4: Simplify right side
    81,219.36x = 7,831,117,895.15
  5. Step 5: Solve for x
    x = 7,831,117,895.15/81,219.36
  6. Step 6: Final answer
    x = 96,419.35

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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.