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Finding the Fourth Proportional to 113,429.16, 170,143.74 and 30,321

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Solution

The fourth proportional to 113,429.16, 170,143.74 and 30,321 is: 45,481.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,429.16 : 170,143.74 = 30,321 : x
  2. Step 2: Convert to fraction form
    113,429.16/170,143.74 = 30,321/x
  3. Step 3: Cross multiply
    113,429.16x = 170,143.74 × 30,321
  4. Step 4: Simplify right side
    113,429.16x = 5,158,928,340.54
  5. Step 5: Solve for x
    x = 5,158,928,340.54/113,429.16
  6. Step 6: Final answer
    x = 45,481.50

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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.