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Finding the Fourth Proportional to 80,086.40, 120,129.60 and 56,466.80

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Solution

The fourth proportional to 80,086.40, 120,129.60 and 56,466.80 is: 84,700.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,086.40 : 120,129.60 = 56,466.80 : x
  2. Step 2: Convert to fraction form
    80,086.40/120,129.60 = 56,466.80/x
  3. Step 3: Cross multiply
    80,086.40x = 120,129.60 × 56,466.80
  4. Step 4: Simplify right side
    80,086.40x = 6,783,334,097.28
  5. Step 5: Solve for x
    x = 6,783,334,097.28/80,086.40
  6. Step 6: Final answer
    x = 84,700.20

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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.