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Finding the Fourth Proportional to 99,125.50, 136,702.44 and 65,120.50

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Solution

The fourth proportional to 99,125.50, 136,702.44 and 65,120.50 is: 89,806.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,125.50 : 136,702.44 = 65,120.50 : x
  2. Step 2: Convert to fraction form
    99,125.50/136,702.44 = 65,120.50/x
  3. Step 3: Cross multiply
    99,125.50x = 136,702.44 × 65,120.50
  4. Step 4: Simplify right side
    99,125.50x = 8,902,131,244.02
  5. Step 5: Solve for x
    x = 8,902,131,244.02/99,125.50
  6. Step 6: Final answer
    x = 89,806.67

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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.