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Finding the Fourth Proportional to 85,321.40, 128,030.70 and 32,768.60

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Solution

The fourth proportional to 85,321.40, 128,030.70 and 32,768.60 is: 49,171.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,321.40 : 128,030.70 = 32,768.60 : x
  2. Step 2: Convert to fraction form
    85,321.40/128,030.70 = 32,768.60/x
  3. Step 3: Cross multiply
    85,321.40x = 128,030.70 × 32,768.60
  4. Step 4: Simplify right side
    85,321.40x = 4,195,386,796.02
  5. Step 5: Solve for x
    x = 4,195,386,796.02/85,321.40
  6. Step 6: Final answer
    x = 49,171.57

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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.