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Finding the Fourth Proportional to 65,219.43, 90,003.15 and 36,930.63

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Solution

The fourth proportional to 65,219.43, 90,003.15 and 36,930.63 is: 50,964.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,219.43 : 90,003.15 = 36,930.63 : x
  2. Step 2: Convert to fraction form
    65,219.43/90,003.15 = 36,930.63/x
  3. Step 3: Cross multiply
    65,219.43x = 90,003.15 × 36,930.63
  4. Step 4: Simplify right side
    65,219.43x = 3,323,873,031.48
  5. Step 5: Solve for x
    x = 3,323,873,031.48/65,219.43
  6. Step 6: Final answer
    x = 50,964.46

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Double scale
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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.