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Finding the Fourth Proportional to 85,967.28, 128,918.12 and 33,364.44

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Solution

The fourth proportional to 85,967.28, 128,918.12 and 33,364.44 is: 50,033.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,967.28 : 128,918.12 = 33,364.44 : x
  2. Step 2: Convert to fraction form
    85,967.28/128,918.12 = 33,364.44/x
  3. Step 3: Cross multiply
    85,967.28x = 128,918.12 × 33,364.44
  4. Step 4: Simplify right side
    85,967.28x = 4,301,280,712.83
  5. Step 5: Solve for x
    x = 4,301,280,712.83/85,967.28
  6. Step 6: Final answer
    x = 50,033.93

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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.