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Finding the Fourth Proportional to 98,485.96, 136,023.78 and 71,748.04

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Solution

The fourth proportional to 98,485.96, 136,023.78 and 71,748.04 is: 99,094.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,485.96 : 136,023.78 = 71,748.04 : x
  2. Step 2: Convert to fraction form
    98,485.96/136,023.78 = 71,748.04/x
  3. Step 3: Cross multiply
    98,485.96x = 136,023.78 × 71,748.04
  4. Step 4: Simplify right side
    98,485.96x = 9,759,439,608.39
  5. Step 5: Solve for x
    x = 9,759,439,608.39/98,485.96
  6. Step 6: Final answer
    x = 99,094.73

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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.