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Finding the Fourth Proportional to 65,400.50, 90,284.69 and 43,882.55

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Solution

The fourth proportional to 65,400.50, 90,284.69 and 43,882.55 is: 60,579.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,400.50 : 90,284.69 = 43,882.55 : x
  2. Step 2: Convert to fraction form
    65,400.50/90,284.69 = 43,882.55/x
  3. Step 3: Cross multiply
    65,400.50x = 90,284.69 × 43,882.55
  4. Step 4: Simplify right side
    65,400.50x = 3,961,922,423.16
  5. Step 5: Solve for x
    x = 3,961,922,423.16/65,400.50
  6. Step 6: Final answer
    x = 60,579.39

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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.