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Finding the Fourth Proportional to 156,351.85, 215,686.26 and 98,894.39

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Solution

The fourth proportional to 156,351.85, 215,686.26 and 98,894.39 is: 136,424.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,351.85 : 215,686.26 = 98,894.39 : x
  2. Step 2: Convert to fraction form
    156,351.85/215,686.26 = 98,894.39/x
  3. Step 3: Cross multiply
    156,351.85x = 215,686.26 × 98,894.39
  4. Step 4: Simplify right side
    156,351.85x = 21,330,161,114.08
  5. Step 5: Solve for x
    x = 21,330,161,114.08/156,351.85
  6. Step 6: Final answer
    x = 136,424.10

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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.