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Finding the Fourth Proportional to 65,338.98, 90,218.58 and 50,207.80

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Solution

The fourth proportional to 65,338.98, 90,218.58 and 50,207.80 is: 69,325.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,338.98 : 90,218.58 = 50,207.80 : x
  2. Step 2: Convert to fraction form
    65,338.98/90,218.58 = 50,207.80/x
  3. Step 3: Cross multiply
    65,338.98x = 90,218.58 × 50,207.80
  4. Step 4: Simplify right side
    65,338.98x = 4,529,676,420.92
  5. Step 5: Solve for x
    x = 4,529,676,420.92/65,338.98
  6. Step 6: Final answer
    x = 69,325.79

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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.