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Finding the Fourth Proportional to 156,646.40, 216,172.20 and 85,026.40

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Solution

The fourth proportional to 156,646.40, 216,172.20 and 85,026.40 is: 117,336.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,646.40 : 216,172.20 = 85,026.40 : x
  2. Step 2: Convert to fraction form
    156,646.40/216,172.20 = 85,026.40/x
  3. Step 3: Cross multiply
    156,646.40x = 216,172.20 × 85,026.40
  4. Step 4: Simplify right side
    156,646.40x = 18,380,343,520.95
  5. Step 5: Solve for x
    x = 18,380,343,520.95/156,646.40
  6. Step 6: Final answer
    x = 117,336.52

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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.