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Finding the Fourth Proportional to 156,866.09, 216,472.37 and 85,246.36

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Solution

The fourth proportional to 156,866.09, 216,472.37 and 85,246.36 is: 117,638.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,866.09 : 216,472.37 = 85,246.36 : x
  2. Step 2: Convert to fraction form
    156,866.09/216,472.37 = 85,246.36/x
  3. Step 3: Cross multiply
    156,866.09x = 216,472.37 × 85,246.36
  4. Step 4: Simplify right side
    156,866.09x = 18,453,480,615.66
  5. Step 5: Solve for x
    x = 18,453,480,615.66/156,866.09
  6. Step 6: Final answer
    x = 117,638.43

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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.