Home / 81,629.80-122,444.70-81,111.40

Finding the Fourth Proportional to 81,629.80, 122,444.70 and 81,111.40

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Solution

The fourth proportional to 81,629.80, 122,444.70 and 81,111.40 is: 121,667.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,629.80 : 122,444.70 = 81,111.40 : x
  2. Step 2: Convert to fraction form
    81,629.80/122,444.70 = 81,111.40/x
  3. Step 3: Cross multiply
    81,629.80x = 122,444.70 × 81,111.40
  4. Step 4: Simplify right side
    81,629.80x = 9,931,661,039.58
  5. Step 5: Solve for x
    x = 9,931,661,039.58/81,629.80
  6. Step 6: Final answer
    x = 121,667.10

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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.