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Finding the Fourth Proportional to 128,533.90, 192,800.85 and 99,009.40

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Solution

The fourth proportional to 128,533.90, 192,800.85 and 99,009.40 is: 148,514.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,533.90 : 192,800.85 = 99,009.40 : x
  2. Step 2: Convert to fraction form
    128,533.90/192,800.85 = 99,009.40/x
  3. Step 3: Cross multiply
    128,533.90x = 192,800.85 × 99,009.40
  4. Step 4: Simplify right side
    128,533.90x = 19,089,096,477.99
  5. Step 5: Solve for x
    x = 19,089,096,477.99/128,533.90
  6. Step 6: Final answer
    x = 148,514.10

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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.