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Finding the Fourth Proportional to 85,953.06, 128,981.43 and 36,705.06

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Solution

The fourth proportional to 85,953.06, 128,981.43 and 36,705.06 is: 55,079.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,953.06 : 128,981.43 = 36,705.06 : x
  2. Step 2: Convert to fraction form
    85,953.06/128,981.43 = 36,705.06/x
  3. Step 3: Cross multiply
    85,953.06x = 128,981.43 × 36,705.06
  4. Step 4: Simplify right side
    85,953.06x = 4,734,271,127.04
  5. Step 5: Solve for x
    x = 4,734,271,127.04/85,953.06
  6. Step 6: Final answer
    x = 55,079.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.