Home / 85,988.71-128,933.25-33,336.55

Finding the Fourth Proportional to 85,988.71, 128,933.25 and 33,336.55

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Solution

The fourth proportional to 85,988.71, 128,933.25 and 33,336.55 is: 49,985.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,988.71 : 128,933.25 = 33,336.55 : x
  2. Step 2: Convert to fraction form
    85,988.71/128,933.25 = 33,336.55/x
  3. Step 3: Cross multiply
    85,988.71x = 128,933.25 × 33,336.55
  4. Step 4: Simplify right side
    85,988.71x = 4,298,189,735.29
  5. Step 5: Solve for x
    x = 4,298,189,735.29/85,988.71
  6. Step 6: Final answer
    x = 49,985.51

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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.