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Finding the Fourth Proportional to 99,189.78, 136,848.60 and 56,163.39

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Solution

The fourth proportional to 99,189.78, 136,848.60 and 56,163.39 is: 77,486.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,189.78 : 136,848.60 = 56,163.39 : x
  2. Step 2: Convert to fraction form
    99,189.78/136,848.60 = 56,163.39/x
  3. Step 3: Cross multiply
    99,189.78x = 136,848.60 × 56,163.39
  4. Step 4: Simplify right side
    99,189.78x = 7,685,881,292.75
  5. Step 5: Solve for x
    x = 7,685,881,292.75/99,189.78
  6. Step 6: Final answer
    x = 77,486.63

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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.