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Finding the Fourth Proportional to 207,076.72, 285,598.92 and 139,073.08

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Solution

The fourth proportional to 207,076.72, 285,598.92 and 139,073.08 is: 191,808.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,076.72 : 285,598.92 = 139,073.08 : x
  2. Step 2: Convert to fraction form
    207,076.72/285,598.92 = 139,073.08/x
  3. Step 3: Cross multiply
    207,076.72x = 285,598.92 × 139,073.08
  4. Step 4: Simplify right side
    207,076.72x = 39,719,121,449.07
  5. Step 5: Solve for x
    x = 39,719,121,449.07/207,076.72
  6. Step 6: Final answer
    x = 191,808.72

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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.