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Finding the Fourth Proportional to 154,191.90, 212,811.12 and 89,698.56

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Solution

The fourth proportional to 154,191.90, 212,811.12 and 89,698.56 is: 123,799.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,191.90 : 212,811.12 = 89,698.56 : x
  2. Step 2: Convert to fraction form
    154,191.90/212,811.12 = 89,698.56/x
  3. Step 3: Cross multiply
    154,191.90x = 212,811.12 × 89,698.56
  4. Step 4: Simplify right side
    154,191.90x = 19,088,851,015.99
  5. Step 5: Solve for x
    x = 19,088,851,015.99/154,191.90
  6. Step 6: Final answer
    x = 123,799.31

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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.