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Finding the Fourth Proportional to 85,847.96, 128,745.74 and 59,364.20

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Solution

The fourth proportional to 85,847.96, 128,745.74 and 59,364.20 is: 89,028.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,847.96 : 128,745.74 = 59,364.20 : x
  2. Step 2: Convert to fraction form
    85,847.96/128,745.74 = 59,364.20/x
  3. Step 3: Cross multiply
    85,847.96x = 128,745.74 × 59,364.20
  4. Step 4: Simplify right side
    85,847.96x = 7,642,887,858.51
  5. Step 5: Solve for x
    x = 7,642,887,858.51/85,847.96
  6. Step 6: Final answer
    x = 89,028.18

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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.