Home / 81,737.09-122,625.39-28,421.37

Finding the Fourth Proportional to 81,737.09, 122,625.39 and 28,421.37

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Solution

The fourth proportional to 81,737.09, 122,625.39 and 28,421.37 is: 42,638.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,737.09 : 122,625.39 = 28,421.37 : x
  2. Step 2: Convert to fraction form
    81,737.09/122,625.39 = 28,421.37/x
  3. Step 3: Cross multiply
    81,737.09x = 122,625.39 × 28,421.37
  4. Step 4: Simplify right side
    81,737.09x = 3,485,181,580.58
  5. Step 5: Solve for x
    x = 3,485,181,580.58/81,737.09
  6. Step 6: Final answer
    x = 42,638.92

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1.5x scale

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.