Home / 122,379.48-168,903.90-72,107.64

Finding the Fourth Proportional to 122,379.48, 168,903.90 and 72,107.64

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Solution

The fourth proportional to 122,379.48, 168,903.90 and 72,107.64 is: 99,520.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,379.48 : 168,903.90 = 72,107.64 : x
  2. Step 2: Convert to fraction form
    122,379.48/168,903.90 = 72,107.64/x
  3. Step 3: Cross multiply
    122,379.48x = 168,903.90 × 72,107.64
  4. Step 4: Simplify right side
    122,379.48x = 12,179,261,615.80
  5. Step 5: Solve for x
    x = 12,179,261,615.80/122,379.48
  6. Step 6: Final answer
    x = 99,520.46

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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.