Home / 85,991.08-128,928.06-43,767.40

Finding the Fourth Proportional to 85,991.08, 128,928.06 and 43,767.40

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Solution

The fourth proportional to 85,991.08, 128,928.06 and 43,767.40 is: 65,621.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,991.08 : 128,928.06 = 43,767.40 : x
  2. Step 2: Convert to fraction form
    85,991.08/128,928.06 = 43,767.40/x
  3. Step 3: Cross multiply
    85,991.08x = 128,928.06 × 43,767.40
  4. Step 4: Simplify right side
    85,991.08x = 5,642,845,973.24
  5. Step 5: Solve for x
    x = 5,642,845,973.24/85,991.08
  6. Step 6: Final answer
    x = 65,621.29

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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.