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Finding the Fourth Proportional to 189,234.40, 283,477.20 and 122,720.80

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Solution

The fourth proportional to 189,234.40, 283,477.20 and 122,720.80 is: 183,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,234.40 : 283,477.20 = 122,720.80 : x
  2. Step 2: Convert to fraction form
    189,234.40/283,477.20 = 122,720.80/x
  3. Step 3: Cross multiply
    189,234.40x = 283,477.20 × 122,720.80
  4. Step 4: Simplify right side
    189,234.40x = 34,788,548,765.76
  5. Step 5: Solve for x
    x = 34,788,548,765.76/189,234.40
  6. Step 6: Final answer
    x = 183,838.40

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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.