Home / 120,421.70-166,024.39-103,606.56

Finding the Fourth Proportional to 120,421.70, 166,024.39 and 103,606.56

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Solution

The fourth proportional to 120,421.70, 166,024.39 and 103,606.56 is: 142,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,421.70 : 166,024.39 = 103,606.56 : x
  2. Step 2: Convert to fraction form
    120,421.70/166,024.39 = 103,606.56/x
  3. Step 3: Cross multiply
    120,421.70x = 166,024.39 × 103,606.56
  4. Step 4: Simplify right side
    120,421.70x = 17,201,215,924.00
  5. Step 5: Solve for x
    x = 17,201,215,924.00/120,421.70
  6. Step 6: Final answer
    x = 142,841.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.