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Finding the Fourth Proportional to 99,143.46, 148,696.29 and 28,065.51

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Solution

The fourth proportional to 99,143.46, 148,696.29 and 28,065.51 is: 42,092.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,143.46 : 148,696.29 = 28,065.51 : x
  2. Step 2: Convert to fraction form
    99,143.46/148,696.29 = 28,065.51/x
  3. Step 3: Cross multiply
    99,143.46x = 148,696.29 × 28,065.51
  4. Step 4: Simplify right side
    99,143.46x = 4,173,237,213.96
  5. Step 5: Solve for x
    x = 4,173,237,213.96/99,143.46
  6. Step 6: Final answer
    x = 42,092.91

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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.