Home / 85,535.38-127,401.12-81,697.60

Finding the Fourth Proportional to 85,535.38, 127,401.12 and 81,697.60

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Solution

The fourth proportional to 85,535.38, 127,401.12 and 81,697.60 is: 121,684.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,535.38 : 127,401.12 = 81,697.60 : x
  2. Step 2: Convert to fraction form
    85,535.38/127,401.12 = 81,697.60/x
  3. Step 3: Cross multiply
    85,535.38x = 127,401.12 × 81,697.60
  4. Step 4: Simplify right side
    85,535.38x = 10,408,365,741.31
  5. Step 5: Solve for x
    x = 10,408,365,741.31/85,535.38
  6. Step 6: Final answer
    x = 121,684.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.