Home / 65,639.22-90,391.55-57,021.50

Finding the Fourth Proportional to 65,639.22, 90,391.55 and 57,021.50

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Solution

The fourth proportional to 65,639.22, 90,391.55 and 57,021.50 is: 78,524.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,639.22 : 90,391.55 = 57,021.50 : x
  2. Step 2: Convert to fraction form
    65,639.22/90,391.55 = 57,021.50/x
  3. Step 3: Cross multiply
    65,639.22x = 90,391.55 × 57,021.50
  4. Step 4: Simplify right side
    65,639.22x = 5,154,262,029.94
  5. Step 5: Solve for x
    x = 5,154,262,029.94/65,639.22
  6. Step 6: Final answer
    x = 78,524.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.