Home / 121,306.10-166,650.09-100,019.30

Finding the Fourth Proportional to 121,306.10, 166,650.09 and 100,019.30

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Solution

The fourth proportional to 121,306.10, 166,650.09 and 100,019.30 is: 137,406.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,306.10 : 166,650.09 = 100,019.30 : x
  2. Step 2: Convert to fraction form
    121,306.10/166,650.09 = 100,019.30/x
  3. Step 3: Cross multiply
    121,306.10x = 166,650.09 × 100,019.30
  4. Step 4: Simplify right side
    121,306.10x = 16,668,224,846.64
  5. Step 5: Solve for x
    x = 16,668,224,846.64/121,306.10
  6. Step 6: Final answer
    x = 137,406.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.