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Finding the Fourth Proportional to 189,212.80, 283,430.40 and 130,115.20

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Solution

The fourth proportional to 189,212.80, 283,430.40 and 130,115.20 is: 194,905.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,212.80 : 283,430.40 = 130,115.20 : x
  2. Step 2: Convert to fraction form
    189,212.80/283,430.40 = 130,115.20/x
  3. Step 3: Cross multiply
    189,212.80x = 283,430.40 × 130,115.20
  4. Step 4: Simplify right side
    189,212.80x = 36,878,603,182.08
  5. Step 5: Solve for x
    x = 36,878,603,182.08/189,212.80
  6. Step 6: Final answer
    x = 194,905.44

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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.