Home / 81,464.09-122,166.16-28,142.51

Finding the Fourth Proportional to 81,464.09, 122,166.16 and 28,142.51

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Solution

The fourth proportional to 81,464.09, 122,166.16 and 28,142.51 is: 42,203.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,464.09 : 122,166.16 = 28,142.51 : x
  2. Step 2: Convert to fraction form
    81,464.09/122,166.16 = 28,142.51/x
  3. Step 3: Cross multiply
    81,464.09x = 122,166.16 × 28,142.51
  4. Step 4: Simplify right side
    81,464.09x = 3,438,061,698.27
  5. Step 5: Solve for x
    x = 3,438,061,698.27/81,464.09
  6. Step 6: Final answer
    x = 42,203.40

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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.