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Finding the Fourth Proportional to 99,143.91, 136,814.54 and 53,820.14

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Solution

The fourth proportional to 99,143.91, 136,814.54 and 53,820.14 is: 74,269.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,143.91 : 136,814.54 = 53,820.14 : x
  2. Step 2: Convert to fraction form
    99,143.91/136,814.54 = 53,820.14/x
  3. Step 3: Cross multiply
    99,143.91x = 136,814.54 × 53,820.14
  4. Step 4: Simplify right side
    99,143.91x = 7,363,376,743.66
  5. Step 5: Solve for x
    x = 7,363,376,743.66/99,143.91
  6. Step 6: Final answer
    x = 74,269.58

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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.