Home / 65,515.68-90,421.35-40,036.73

Finding the Fourth Proportional to 65,515.68, 90,421.35 and 40,036.73

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Solution

The fourth proportional to 65,515.68, 90,421.35 and 40,036.73 is: 55,256.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,515.68 : 90,421.35 = 40,036.73 : x
  2. Step 2: Convert to fraction form
    65,515.68/90,421.35 = 40,036.73/x
  3. Step 3: Cross multiply
    65,515.68x = 90,421.35 × 40,036.73
  4. Step 4: Simplify right side
    65,515.68x = 3,620,174,573.94
  5. Step 5: Solve for x
    x = 3,620,174,573.94/65,515.68
  6. Step 6: Final answer
    x = 55,256.61

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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.