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Finding the Fourth Proportional to 119,999.40, 179,999.10 and 80,341.80

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Solution

The fourth proportional to 119,999.40, 179,999.10 and 80,341.80 is: 120,512.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,999.40 : 179,999.10 = 80,341.80 : x
  2. Step 2: Convert to fraction form
    119,999.40/179,999.10 = 80,341.80/x
  3. Step 3: Cross multiply
    119,999.40x = 179,999.10 × 80,341.80
  4. Step 4: Simplify right side
    119,999.40x = 14,461,451,692.38
  5. Step 5: Solve for x
    x = 14,461,451,692.38/119,999.40
  6. Step 6: Final answer
    x = 120,512.70

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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.