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Finding the Fourth Proportional to 42,863.22, 64,310.22 and 19,168.74

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Solution

The fourth proportional to 42,863.22, 64,310.22 and 19,168.74 is: 28,759.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,863.22 : 64,310.22 = 19,168.74 : x
  2. Step 2: Convert to fraction form
    42,863.22/64,310.22 = 19,168.74/x
  3. Step 3: Cross multiply
    42,863.22x = 64,310.22 × 19,168.74
  4. Step 4: Simplify right side
    42,863.22x = 1,232,745,886.52
  5. Step 5: Solve for x
    x = 1,232,745,886.52/42,863.22
  6. Step 6: Final answer
    x = 28,759.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.