Home / 122,861.54-169,508.01-100,161.40

Finding the Fourth Proportional to 122,861.54, 169,508.01 and 100,161.40

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Solution

The fourth proportional to 122,861.54, 169,508.01 and 100,161.40 is: 138,189.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,861.54 : 169,508.01 = 100,161.40 : x
  2. Step 2: Convert to fraction form
    122,861.54/169,508.01 = 100,161.40/x
  3. Step 3: Cross multiply
    122,861.54x = 169,508.01 × 100,161.40
  4. Step 4: Simplify right side
    122,861.54x = 16,978,159,169.04
  5. Step 5: Solve for x
    x = 16,978,159,169.04/122,861.54
  6. Step 6: Final answer
    x = 138,189.37

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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.