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Finding the Fourth Proportional to 65,299.68, 90,087.72 and 42,631.44

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Solution

The fourth proportional to 65,299.68, 90,087.72 and 42,631.44 is: 58,814.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,299.68 : 90,087.72 = 42,631.44 : x
  2. Step 2: Convert to fraction form
    65,299.68/90,087.72 = 42,631.44/x
  3. Step 3: Cross multiply
    65,299.68x = 90,087.72 × 42,631.44
  4. Step 4: Simplify right side
    65,299.68x = 3,840,569,229.92
  5. Step 5: Solve for x
    x = 3,840,569,229.92/65,299.68
  6. Step 6: Final answer
    x = 58,814.52

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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.