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Finding the Fourth Proportional to 156,314.79, 215,714.12 and 84,696.75

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Solution

The fourth proportional to 156,314.79, 215,714.12 and 84,696.75 is: 116,881.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,314.79 : 215,714.12 = 84,696.75 : x
  2. Step 2: Convert to fraction form
    156,314.79/215,714.12 = 84,696.75/x
  3. Step 3: Cross multiply
    156,314.79x = 215,714.12 × 84,696.75
  4. Step 4: Simplify right side
    156,314.79x = 18,270,284,469.63
  5. Step 5: Solve for x
    x = 18,270,284,469.63/156,314.79
  6. Step 6: Final answer
    x = 116,881.36

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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.