Home / 81,029.34-121,556.16-28,429.56

Finding the Fourth Proportional to 81,029.34, 121,556.16 and 28,429.56

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Solution

The fourth proportional to 81,029.34, 121,556.16 and 28,429.56 is: 42,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,029.34 : 121,556.16 = 28,429.56 : x
  2. Step 2: Convert to fraction form
    81,029.34/121,556.16 = 28,429.56/x
  3. Step 3: Cross multiply
    81,029.34x = 121,556.16 × 28,429.56
  4. Step 4: Simplify right side
    81,029.34x = 3,455,788,144.09
  5. Step 5: Solve for x
    x = 3,455,788,144.09/81,029.34
  6. Step 6: Final answer
    x = 42,648.60

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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.