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Finding the Fourth Proportional to 98,855.90, 136,420.88 and 53,533.88

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Solution

The fourth proportional to 98,855.90, 136,420.88 and 53,533.88 is: 73,876.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,855.90 : 136,420.88 = 53,533.88 : x
  2. Step 2: Convert to fraction form
    98,855.90/136,420.88 = 53,533.88/x
  3. Step 3: Cross multiply
    98,855.90x = 136,420.88 × 53,533.88
  4. Step 4: Simplify right side
    98,855.90x = 7,303,139,019.41
  5. Step 5: Solve for x
    x = 7,303,139,019.41/98,855.90
  6. Step 6: Final answer
    x = 73,876.61

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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.