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Finding the Fourth Proportional to 139,369.01, 192,356.19 and 90,886.78

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Solution

The fourth proportional to 139,369.01, 192,356.19 and 90,886.78 is: 125,441.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,369.01 : 192,356.19 = 90,886.78 : x
  2. Step 2: Convert to fraction form
    139,369.01/192,356.19 = 90,886.78/x
  3. Step 3: Cross multiply
    139,369.01x = 192,356.19 × 90,886.78
  4. Step 4: Simplify right side
    139,369.01x = 17,482,634,722.17
  5. Step 5: Solve for x
    x = 17,482,634,722.17/139,369.01
  6. Step 6: Final answer
    x = 125,441.34

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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.