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Finding the Fourth Proportional to 130,023.40, 194,889.30 and 66,819.10

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Solution

The fourth proportional to 130,023.40, 194,889.30 and 66,819.10 is: 100,153.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,023.40 : 194,889.30 = 66,819.10 : x
  2. Step 2: Convert to fraction form
    130,023.40/194,889.30 = 66,819.10/x
  3. Step 3: Cross multiply
    130,023.40x = 194,889.30 × 66,819.10
  4. Step 4: Simplify right side
    130,023.40x = 13,022,327,625.63
  5. Step 5: Solve for x
    x = 13,022,327,625.63/130,023.40
  6. Step 6: Final answer
    x = 100,153.72

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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.