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Finding the Fourth Proportional to 85,971.78, 128,924.87 and 33,368.94

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Solution

The fourth proportional to 85,971.78, 128,924.87 and 33,368.94 is: 50,040.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,971.78 : 128,924.87 = 33,368.94 : x
  2. Step 2: Convert to fraction form
    85,971.78/128,924.87 = 33,368.94/x
  3. Step 3: Cross multiply
    85,971.78x = 128,924.87 × 33,368.94
  4. Step 4: Simplify right side
    85,971.78x = 4,302,086,084.69
  5. Step 5: Solve for x
    x = 4,302,086,084.69/85,971.78
  6. Step 6: Final answer
    x = 50,040.68

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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.