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Finding the Fourth Proportional to 85,628.44, 128,428.62 and 23,303.80

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Solution

The fourth proportional to 85,628.44, 128,428.62 and 23,303.80 is: 34,951.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,628.44 : 128,428.62 = 23,303.80 : x
  2. Step 2: Convert to fraction form
    85,628.44/128,428.62 = 23,303.80/x
  3. Step 3: Cross multiply
    85,628.44x = 128,428.62 × 23,303.80
  4. Step 4: Simplify right side
    85,628.44x = 2,992,874,874.76
  5. Step 5: Solve for x
    x = 2,992,874,874.76/85,628.44
  6. Step 6: Final answer
    x = 34,951.88

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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.