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Finding the Fourth Proportional to 65,713.50, 90,684.78 and 37,419.21

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Solution

The fourth proportional to 65,713.50, 90,684.78 and 37,419.21 is: 51,638.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,713.50 : 90,684.78 = 37,419.21 : x
  2. Step 2: Convert to fraction form
    65,713.50/90,684.78 = 37,419.21/x
  3. Step 3: Cross multiply
    65,713.50x = 90,684.78 × 37,419.21
  4. Step 4: Simplify right side
    65,713.50x = 3,393,352,826.62
  5. Step 5: Solve for x
    x = 3,393,352,826.62/65,713.50
  6. Step 6: Final answer
    x = 51,638.60

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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.