Home / 85,395.09-128,170.76-43,304.22

Finding the Fourth Proportional to 85,395.09, 128,170.76 and 43,304.22

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Solution

The fourth proportional to 85,395.09, 128,170.76 and 43,304.22 is: 64,995.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,395.09 : 128,170.76 = 43,304.22 : x
  2. Step 2: Convert to fraction form
    85,395.09/128,170.76 = 43,304.22/x
  3. Step 3: Cross multiply
    85,395.09x = 128,170.76 × 43,304.22
  4. Step 4: Simplify right side
    85,395.09x = 5,550,335,114.64
  5. Step 5: Solve for x
    x = 5,550,335,114.64/85,395.09
  6. Step 6: Final answer
    x = 64,995.95

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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.