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Finding the Fourth Proportional to 117,480.40, 162,039.12 and 82,969.60

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Solution

The fourth proportional to 117,480.40, 162,039.12 and 82,969.60 is: 114,438.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,480.40 : 162,039.12 = 82,969.60 : x
  2. Step 2: Convert to fraction form
    117,480.40/162,039.12 = 82,969.60/x
  3. Step 3: Cross multiply
    117,480.40x = 162,039.12 × 82,969.60
  4. Step 4: Simplify right side
    117,480.40x = 13,444,320,970.75
  5. Step 5: Solve for x
    x = 13,444,320,970.75/117,480.40
  6. Step 6: Final answer
    x = 114,438.84

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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.