Home / 85,959.16-128,938.78-26,799.60

Finding the Fourth Proportional to 85,959.16, 128,938.78 and 26,799.60

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Solution

The fourth proportional to 85,959.16, 128,938.78 and 26,799.60 is: 40,199.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,959.16 : 128,938.78 = 26,799.60 : x
  2. Step 2: Convert to fraction form
    85,959.16/128,938.78 = 26,799.60/x
  3. Step 3: Cross multiply
    85,959.16x = 128,938.78 × 26,799.60
  4. Step 4: Simplify right side
    85,959.16x = 3,455,507,728.49
  5. Step 5: Solve for x
    x = 3,455,507,728.49/85,959.16
  6. Step 6: Final answer
    x = 40,199.41

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Similar ratio
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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.