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Finding the Fourth Proportional to 117,573.12, 162,162 and 81,745.20

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Solution

The fourth proportional to 117,573.12, 162,162 and 81,745.20 is: 112,746.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,573.12 : 162,162 = 81,745.20 : x
  2. Step 2: Convert to fraction form
    117,573.12/162,162 = 81,745.20/x
  3. Step 3: Cross multiply
    117,573.12x = 162,162 × 81,745.20
  4. Step 4: Simplify right side
    117,573.12x = 13,255,965,122.40
  5. Step 5: Solve for x
    x = 13,255,965,122.40/117,573.12
  6. Step 6: Final answer
    x = 112,746.56

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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.