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Finding the Fourth Proportional to 189,139.80, 283,320.90 and 130,042.20

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Solution

The fourth proportional to 189,139.80, 283,320.90 and 130,042.20 is: 194,795.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,139.80 : 283,320.90 = 130,042.20 : x
  2. Step 2: Convert to fraction form
    189,139.80/283,320.90 = 130,042.20/x
  3. Step 3: Cross multiply
    189,139.80x = 283,320.90 × 130,042.20
  4. Step 4: Simplify right side
    189,139.80x = 36,843,673,141.98
  5. Step 5: Solve for x
    x = 36,843,673,141.98/189,139.80
  6. Step 6: Final answer
    x = 194,795.98

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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.