Home / 131,435.40-197,153.10-86,334.60

Finding the Fourth Proportional to 131,435.40, 197,153.10 and 86,334.60

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Solution

The fourth proportional to 131,435.40, 197,153.10 and 86,334.60 is: 129,501.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,435.40 : 197,153.10 = 86,334.60 : x
  2. Step 2: Convert to fraction form
    131,435.40/197,153.10 = 86,334.60/x
  3. Step 3: Cross multiply
    131,435.40x = 197,153.10 × 86,334.60
  4. Step 4: Simplify right side
    131,435.40x = 17,021,134,027.26
  5. Step 5: Solve for x
    x = 17,021,134,027.26/131,435.40
  6. Step 6: Final answer
    x = 129,501.90

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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.