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Finding the Fourth Proportional to 172,848.80, 258,981.60 and 83,910.80

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Solution

The fourth proportional to 172,848.80, 258,981.60 and 83,910.80 is: 125,724.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,848.80 : 258,981.60 = 83,910.80 : x
  2. Step 2: Convert to fraction form
    172,848.80/258,981.60 = 83,910.80/x
  3. Step 3: Cross multiply
    172,848.80x = 258,981.60 × 83,910.80
  4. Step 4: Simplify right side
    172,848.80x = 21,731,353,241.28
  5. Step 5: Solve for x
    x = 21,731,353,241.28/172,848.80
  6. Step 6: Final answer
    x = 125,724.64

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1.5x scale

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.