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Finding the Fourth Proportional to 65,675.70, 90,634.70 and 38,841.21

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Solution

The fourth proportional to 65,675.70, 90,634.70 and 38,841.21 is: 53,602.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,675.70 : 90,634.70 = 38,841.21 : x
  2. Step 2: Convert to fraction form
    65,675.70/90,634.70 = 38,841.21/x
  3. Step 3: Cross multiply
    65,675.70x = 90,634.70 × 38,841.21
  4. Step 4: Simplify right side
    65,675.70x = 3,520,361,513.09
  5. Step 5: Solve for x
    x = 3,520,361,513.09/65,675.70
  6. Step 6: Final answer
    x = 53,602.19

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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.