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Finding the Fourth Proportional to 98,982.92, 136,560.63 and 65,009.81

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Solution

The fourth proportional to 98,982.92, 136,560.63 and 65,009.81 is: 89,690.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,982.92 : 136,560.63 = 65,009.81 : x
  2. Step 2: Convert to fraction form
    98,982.92/136,560.63 = 65,009.81/x
  3. Step 3: Cross multiply
    98,982.92x = 136,560.63 × 65,009.81
  4. Step 4: Simplify right side
    98,982.92x = 8,877,780,609.78
  5. Step 5: Solve for x
    x = 8,877,780,609.78/98,982.92
  6. Step 6: Final answer
    x = 89,690.03

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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.