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Finding the Fourth Proportional to 156,690.45, 216,232.18 and 85,070.45

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Solution

The fourth proportional to 156,690.45, 216,232.18 and 85,070.45 is: 117,396.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,690.45 : 216,232.18 = 85,070.45 : x
  2. Step 2: Convert to fraction form
    156,690.45/216,232.18 = 85,070.45/x
  3. Step 3: Cross multiply
    156,690.45x = 216,232.18 × 85,070.45
  4. Step 4: Simplify right side
    156,690.45x = 18,394,969,663.51
  5. Step 5: Solve for x
    x = 18,394,969,663.51/156,690.45
  6. Step 6: Final answer
    x = 117,396.88

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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.