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Finding the Fourth Proportional to 156,386.89, 215,808.65 and 92,686.87

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Solution

The fourth proportional to 156,386.89, 215,808.65 and 92,686.87 is: 127,904.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,386.89 : 215,808.65 = 92,686.87 : x
  2. Step 2: Convert to fraction form
    156,386.89/215,808.65 = 92,686.87/x
  3. Step 3: Cross multiply
    156,386.89x = 215,808.65 × 92,686.87
  4. Step 4: Simplify right side
    156,386.89x = 20,002,628,287.43
  5. Step 5: Solve for x
    x = 20,002,628,287.43/156,386.89
  6. Step 6: Final answer
    x = 127,904.76

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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.