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Finding the Fourth Proportional to 139,699.08, 192,783.75 and 76,036.88

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Solution

The fourth proportional to 139,699.08, 192,783.75 and 76,036.88 is: 104,930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,699.08 : 192,783.75 = 76,036.88 : x
  2. Step 2: Convert to fraction form
    139,699.08/192,783.75 = 76,036.88/x
  3. Step 3: Cross multiply
    139,699.08x = 192,783.75 × 76,036.88
  4. Step 4: Simplify right side
    139,699.08x = 14,658,673,977.11
  5. Step 5: Solve for x
    x = 14,658,673,977.11/139,699.08
  6. Step 6: Final answer
    x = 104,930.35

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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.