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Finding the Fourth Proportional to 65,863.50, 90,866.82 and 43,214.99

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Solution

The fourth proportional to 65,863.50, 90,866.82 and 43,214.99 is: 59,620.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,863.50 : 90,866.82 = 43,214.99 : x
  2. Step 2: Convert to fraction form
    65,863.50/90,866.82 = 43,214.99/x
  3. Step 3: Cross multiply
    65,863.50x = 90,866.82 × 43,214.99
  4. Step 4: Simplify right side
    65,863.50x = 3,926,808,766.10
  5. Step 5: Solve for x
    x = 3,926,808,766.10/65,863.50
  6. Step 6: Final answer
    x = 59,620.41

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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.