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Finding the Fourth Proportional to 99,663.80, 149,495.70 and 93,054.20

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Solution

The fourth proportional to 99,663.80, 149,495.70 and 93,054.20 is: 139,581.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,663.80 : 149,495.70 = 93,054.20 : x
  2. Step 2: Convert to fraction form
    99,663.80/149,495.70 = 93,054.20/x
  3. Step 3: Cross multiply
    99,663.80x = 149,495.70 × 93,054.20
  4. Step 4: Simplify right side
    99,663.80x = 13,911,202,766.94
  5. Step 5: Solve for x
    x = 13,911,202,766.94/99,663.80
  6. Step 6: Final answer
    x = 139,581.30

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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.