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Finding the Fourth Proportional to 306,072.60, 459,108.90 and 128,520.60

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Solution

The fourth proportional to 306,072.60, 459,108.90 and 128,520.60 is: 192,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,072.60 : 459,108.90 = 128,520.60 : x
  2. Step 2: Convert to fraction form
    306,072.60/459,108.90 = 128,520.60/x
  3. Step 3: Cross multiply
    306,072.60x = 459,108.90 × 128,520.60
  4. Step 4: Simplify right side
    306,072.60x = 59,004,951,293.34
  5. Step 5: Solve for x
    x = 59,004,951,293.34/306,072.60
  6. Step 6: Final answer
    x = 192,780.90

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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.