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Finding the Fourth Proportional to 128,148.70, 192,223.05 and 83,911.90

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Solution

The fourth proportional to 128,148.70, 192,223.05 and 83,911.90 is: 125,867.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,148.70 : 192,223.05 = 83,911.90 : x
  2. Step 2: Convert to fraction form
    128,148.70/192,223.05 = 83,911.90/x
  3. Step 3: Cross multiply
    128,148.70x = 192,223.05 × 83,911.90
  4. Step 4: Simplify right side
    128,148.70x = 16,129,801,349.30
  5. Step 5: Solve for x
    x = 16,129,801,349.30/128,148.70
  6. Step 6: Final answer
    x = 125,867.85

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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.