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Finding the Fourth Proportional to 210,906.60, 316,267.74 and 63,128.04

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Solution

The fourth proportional to 210,906.60, 316,267.74 and 63,128.04 is: 94,664.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,906.60 : 316,267.74 = 63,128.04 : x
  2. Step 2: Convert to fraction form
    210,906.60/316,267.74 = 63,128.04/x
  3. Step 3: Cross multiply
    210,906.60x = 316,267.74 × 63,128.04
  4. Step 4: Simplify right side
    210,906.60x = 19,965,362,541.43
  5. Step 5: Solve for x
    x = 19,965,362,541.43/210,906.60
  6. Step 6: Final answer
    x = 94,664.47

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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.