Home / 81,531.12-122,153.64-58,035.12

Finding the Fourth Proportional to 81,531.12, 122,153.64 and 58,035.12

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Solution

The fourth proportional to 81,531.12, 122,153.64 and 58,035.12 is: 86,950.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,531.12 : 122,153.64 = 58,035.12 : x
  2. Step 2: Convert to fraction form
    81,531.12/122,153.64 = 58,035.12/x
  3. Step 3: Cross multiply
    81,531.12x = 122,153.64 × 58,035.12
  4. Step 4: Simplify right side
    81,531.12x = 7,089,201,155.84
  5. Step 5: Solve for x
    x = 7,089,201,155.84/81,531.12
  6. Step 6: Final answer
    x = 86,950.86

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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.