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Finding the Fourth Proportional to 112,178.88, 154,807.68 and 61,879.68

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Solution

The fourth proportional to 112,178.88, 154,807.68 and 61,879.68 is: 85,394.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,178.88 : 154,807.68 = 61,879.68 : x
  2. Step 2: Convert to fraction form
    112,178.88/154,807.68 = 61,879.68/x
  3. Step 3: Cross multiply
    112,178.88x = 154,807.68 × 61,879.68
  4. Step 4: Simplify right side
    112,178.88x = 9,579,449,699.94
  5. Step 5: Solve for x
    x = 9,579,449,699.94/112,178.88
  6. Step 6: Final answer
    x = 85,394.41

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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.