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Finding the Fourth Proportional to 100,886.38, 139,232.92 and 56,174.38

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Solution

The fourth proportional to 100,886.38, 139,232.92 and 56,174.38 is: 77,526.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,886.38 : 139,232.92 = 56,174.38 : x
  2. Step 2: Convert to fraction form
    100,886.38/139,232.92 = 56,174.38/x
  3. Step 3: Cross multiply
    100,886.38x = 139,232.92 × 56,174.38
  4. Step 4: Simplify right side
    100,886.38x = 7,821,322,956.59
  5. Step 5: Solve for x
    x = 7,821,322,956.59/100,886.38
  6. Step 6: Final answer
    x = 77,526.05

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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.