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Finding the Fourth Proportional to 125,832.80, 188,967.90 and 66,783.80

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Solution

The fourth proportional to 125,832.80, 188,967.90 and 66,783.80 is: 100,291.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,832.80 : 188,967.90 = 66,783.80 : x
  2. Step 2: Convert to fraction form
    125,832.80/188,967.90 = 66,783.80/x
  3. Step 3: Cross multiply
    125,832.80x = 188,967.90 × 66,783.80
  4. Step 4: Simplify right side
    125,832.80x = 12,619,994,440.02
  5. Step 5: Solve for x
    x = 12,619,994,440.02/125,832.80
  6. Step 6: Final answer
    x = 100,291.77

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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.