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Finding the Fourth Proportional to 117,975, 162,805.50 and 67,690.20

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Solution

The fourth proportional to 117,975, 162,805.50 and 67,690.20 is: 93,412.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,975 : 162,805.50 = 67,690.20 : x
  2. Step 2: Convert to fraction form
    117,975/162,805.50 = 67,690.20/x
  3. Step 3: Cross multiply
    117,975x = 162,805.50 × 67,690.20
  4. Step 4: Simplify right side
    117,975x = 11,020,336,856.10
  5. Step 5: Solve for x
    x = 11,020,336,856.10/117,975
  6. Step 6: Final answer
    x = 93,412.48

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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.