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Finding the Fourth Proportional to 98,968.86, 136,640.18 and 65,037.56

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Solution

The fourth proportional to 98,968.86, 136,640.18 and 65,037.56 is: 89,793.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,968.86 : 136,640.18 = 65,037.56 : x
  2. Step 2: Convert to fraction form
    98,968.86/136,640.18 = 65,037.56/x
  3. Step 3: Cross multiply
    98,968.86x = 136,640.18 × 65,037.56
  4. Step 4: Simplify right side
    98,968.86x = 8,886,743,384.55
  5. Step 5: Solve for x
    x = 8,886,743,384.55/98,968.86
  6. Step 6: Final answer
    x = 89,793.33

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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.