Home / 128,289.60-192,171.78-75,539.16

Finding the Fourth Proportional to 128,289.60, 192,171.78 and 75,539.16

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Solution

The fourth proportional to 128,289.60, 192,171.78 and 75,539.16 is: 113,154.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,289.60 : 192,171.78 = 75,539.16 : x
  2. Step 2: Convert to fraction form
    128,289.60/192,171.78 = 75,539.16/x
  3. Step 3: Cross multiply
    128,289.60x = 192,171.78 × 75,539.16
  4. Step 4: Simplify right side
    128,289.60x = 14,516,494,836.90
  5. Step 5: Solve for x
    x = 14,516,494,836.90/128,289.60
  6. Step 6: Final answer
    x = 113,154.10

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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.