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Finding the Fourth Proportional to 98,718.75, 136,231.88 and 53,396.73

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Solution

The fourth proportional to 98,718.75, 136,231.88 and 53,396.73 is: 73,687.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,718.75 : 136,231.88 = 53,396.73 : x
  2. Step 2: Convert to fraction form
    98,718.75/136,231.88 = 53,396.73/x
  3. Step 3: Cross multiply
    98,718.75x = 136,231.88 × 53,396.73
  4. Step 4: Simplify right side
    98,718.75x = 7,274,336,646.77
  5. Step 5: Solve for x
    x = 7,274,336,646.77/98,718.75
  6. Step 6: Final answer
    x = 73,687.49

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1.5x scale

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.