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Finding the Fourth Proportional to 205,585.84, 308,495.40 and 81,014.32

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Solution

The fourth proportional to 205,585.84, 308,495.40 and 81,014.32 is: 121,567.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,585.84 : 308,495.40 = 81,014.32 : x
  2. Step 2: Convert to fraction form
    205,585.84/308,495.40 = 81,014.32/x
  3. Step 3: Cross multiply
    205,585.84x = 308,495.40 × 81,014.32
  4. Step 4: Simplify right side
    205,585.84x = 24,992,545,054.13
  5. Step 5: Solve for x
    x = 24,992,545,054.13/205,585.84
  6. Step 6: Final answer
    x = 121,567.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.