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Finding the Fourth Proportional to 189,097.20, 283,645.80 and 126,428.40

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Solution

The fourth proportional to 189,097.20, 283,645.80 and 126,428.40 is: 189,642.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,097.20 : 283,645.80 = 126,428.40 : x
  2. Step 2: Convert to fraction form
    189,097.20/283,645.80 = 126,428.40/x
  3. Step 3: Cross multiply
    189,097.20x = 283,645.80 × 126,428.40
  4. Step 4: Simplify right side
    189,097.20x = 35,860,884,660.72
  5. Step 5: Solve for x
    x = 35,860,884,660.72/189,097.20
  6. Step 6: Final answer
    x = 189,642.60

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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.