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Finding the Fourth Proportional to 65,456.40, 90,330.60 and 35,648.40

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Solution

The fourth proportional to 65,456.40, 90,330.60 and 35,648.40 is: 49,195.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,456.40 : 90,330.60 = 35,648.40 : x
  2. Step 2: Convert to fraction form
    65,456.40/90,330.60 = 35,648.40/x
  3. Step 3: Cross multiply
    65,456.40x = 90,330.60 × 35,648.40
  4. Step 4: Simplify right side
    65,456.40x = 3,220,141,361.04
  5. Step 5: Solve for x
    x = 3,220,141,361.04/65,456.40
  6. Step 6: Final answer
    x = 49,195.21

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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.