Home / 105,324.60-145,380.78-86,662.20

Finding the Fourth Proportional to 105,324.60, 145,380.78 and 86,662.20

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Solution

The fourth proportional to 105,324.60, 145,380.78 and 86,662.20 is: 119,620.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,324.60 : 145,380.78 = 86,662.20 : x
  2. Step 2: Convert to fraction form
    105,324.60/145,380.78 = 86,662.20/x
  3. Step 3: Cross multiply
    105,324.60x = 145,380.78 × 86,662.20
  4. Step 4: Simplify right side
    105,324.60x = 12,599,018,232.52
  5. Step 5: Solve for x
    x = 12,599,018,232.52/105,324.60
  6. Step 6: Final answer
    x = 119,620.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.