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Finding the Fourth Proportional to 156,663, 216,116.32 and 105,611.13

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Solution

The fourth proportional to 156,663, 216,116.32 and 105,611.13 is: 145,690.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,663 : 216,116.32 = 105,611.13 : x
  2. Step 2: Convert to fraction form
    156,663/216,116.32 = 105,611.13/x
  3. Step 3: Cross multiply
    156,663x = 216,116.32 × 105,611.13
  4. Step 4: Simplify right side
    156,663x = 22,824,288,766.64
  5. Step 5: Solve for x
    x = 22,824,288,766.64/156,663
  6. Step 6: Final answer
    x = 145,690.36

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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.