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Finding the Fourth Proportional to 112,420.75, 168,631.12 and 31,364.60

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Solution

The fourth proportional to 112,420.75, 168,631.12 and 31,364.60 is: 47,046.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,420.75 : 168,631.12 = 31,364.60 : x
  2. Step 2: Convert to fraction form
    112,420.75/168,631.12 = 31,364.60/x
  3. Step 3: Cross multiply
    112,420.75x = 168,631.12 × 31,364.60
  4. Step 4: Simplify right side
    112,420.75x = 5,289,047,626.35
  5. Step 5: Solve for x
    x = 5,289,047,626.35/112,420.75
  6. Step 6: Final answer
    x = 47,046.90

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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.