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Finding the Fourth Proportional to 172,986.40, 259,479.60 and 98,077.60

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Solution

The fourth proportional to 172,986.40, 259,479.60 and 98,077.60 is: 147,116.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,986.40 : 259,479.60 = 98,077.60 : x
  2. Step 2: Convert to fraction form
    172,986.40/259,479.60 = 98,077.60/x
  3. Step 3: Cross multiply
    172,986.40x = 259,479.60 × 98,077.60
  4. Step 4: Simplify right side
    172,986.40x = 25,449,136,416.96
  5. Step 5: Solve for x
    x = 25,449,136,416.96/172,986.40
  6. Step 6: Final answer
    x = 147,116.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.