Home / 81,852.36-122,055.69-71,897.87

Finding the Fourth Proportional to 81,852.36, 122,055.69 and 71,897.87

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Solution

The fourth proportional to 81,852.36, 122,055.69 and 71,897.87 is: 107,211.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,852.36 : 122,055.69 = 71,897.87 : x
  2. Step 2: Convert to fraction form
    81,852.36/122,055.69 = 71,897.87/x
  3. Step 3: Cross multiply
    81,852.36x = 122,055.69 × 71,897.87
  4. Step 4: Simplify right side
    81,852.36x = 8,775,543,522.10
  5. Step 5: Solve for x
    x = 8,775,543,522.10/81,852.36
  6. Step 6: Final answer
    x = 107,211.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.