Home / 85,990.08-128,926.56-43,766.40

Finding the Fourth Proportional to 85,990.08, 128,926.56 and 43,766.40

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Solution

The fourth proportional to 85,990.08, 128,926.56 and 43,766.40 is: 65,619.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,990.08 : 128,926.56 = 43,766.40 : x
  2. Step 2: Convert to fraction form
    85,990.08/128,926.56 = 43,766.40/x
  3. Step 3: Cross multiply
    85,990.08x = 128,926.56 × 43,766.40
  4. Step 4: Simplify right side
    85,990.08x = 5,642,651,395.58
  5. Step 5: Solve for x
    x = 5,642,651,395.58/85,990.08
  6. Step 6: Final answer
    x = 65,619.79

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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.