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Finding the Fourth Proportional to 98,704.68, 136,149.69 and 64,715.36

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Solution

The fourth proportional to 98,704.68, 136,149.69 and 64,715.36 is: 89,266.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,704.68 : 136,149.69 = 64,715.36 : x
  2. Step 2: Convert to fraction form
    98,704.68/136,149.69 = 64,715.36/x
  3. Step 3: Cross multiply
    98,704.68x = 136,149.69 × 64,715.36
  4. Step 4: Simplify right side
    98,704.68x = 8,810,975,764.17
  5. Step 5: Solve for x
    x = 8,810,975,764.17/98,704.68
  6. Step 6: Final answer
    x = 89,266.04

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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.