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Finding the Fourth Proportional to 98,993.12, 136,432 and 72,093.04

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Solution

The fourth proportional to 98,993.12, 136,432 and 72,093.04 is: 99,358.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,993.12 : 136,432 = 72,093.04 : x
  2. Step 2: Convert to fraction form
    98,993.12/136,432 = 72,093.04/x
  3. Step 3: Cross multiply
    98,993.12x = 136,432 × 72,093.04
  4. Step 4: Simplify right side
    98,993.12x = 9,835,797,633.28
  5. Step 5: Solve for x
    x = 9,835,797,633.28/98,993.12
  6. Step 6: Final answer
    x = 99,358.40

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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.