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Finding the Fourth Proportional to 65,942.03, 90,994.05 and 39,080.21

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Solution

The fourth proportional to 65,942.03, 90,994.05 and 39,080.21 is: 53,927.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,942.03 : 90,994.05 = 39,080.21 : x
  2. Step 2: Convert to fraction form
    65,942.03/90,994.05 = 39,080.21/x
  3. Step 3: Cross multiply
    65,942.03x = 90,994.05 × 39,080.21
  4. Step 4: Simplify right side
    65,942.03x = 3,556,066,127.78
  5. Step 5: Solve for x
    x = 3,556,066,127.78/65,942.03
  6. Step 6: Final answer
    x = 53,927.15

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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.