Home / 81,970.10-122,955.15-81,451.70

Finding the Fourth Proportional to 81,970.10, 122,955.15 and 81,451.70

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Solution

The fourth proportional to 81,970.10, 122,955.15 and 81,451.70 is: 122,177.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,970.10 : 122,955.15 = 81,451.70 : x
  2. Step 2: Convert to fraction form
    81,970.10/122,955.15 = 81,451.70/x
  3. Step 3: Cross multiply
    81,970.10x = 122,955.15 × 81,451.70
  4. Step 4: Simplify right side
    81,970.10x = 10,014,905,991.26
  5. Step 5: Solve for x
    x = 10,014,905,991.26/81,970.10
  6. Step 6: Final answer
    x = 122,177.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.