Home / 128,050.20-191,945.70-75,432.60

Finding the Fourth Proportional to 128,050.20, 191,945.70 and 75,432.60

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Solution

The fourth proportional to 128,050.20, 191,945.70 and 75,432.60 is: 113,072.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,050.20 : 191,945.70 = 75,432.60 : x
  2. Step 2: Convert to fraction form
    128,050.20/191,945.70 = 75,432.60/x
  3. Step 3: Cross multiply
    128,050.20x = 191,945.70 × 75,432.60
  4. Step 4: Simplify right side
    128,050.20x = 14,478,963,209.82
  5. Step 5: Solve for x
    x = 14,478,963,209.82/128,050.20
  6. Step 6: Final answer
    x = 113,072.55

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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.