Home / 65,454.21-90,335.25-39,955.23

Finding the Fourth Proportional to 65,454.21, 90,335.25 and 39,955.23

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Solution

The fourth proportional to 65,454.21, 90,335.25 and 39,955.23 is: 55,143.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,454.21 : 90,335.25 = 39,955.23 : x
  2. Step 2: Convert to fraction form
    65,454.21/90,335.25 = 39,955.23/x
  3. Step 3: Cross multiply
    65,454.21x = 90,335.25 × 39,955.23
  4. Step 4: Simplify right side
    65,454.21x = 3,609,365,690.86
  5. Step 5: Solve for x
    x = 3,609,365,690.86/65,454.21
  6. Step 6: Final answer
    x = 55,143.37

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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.