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Finding the Fourth Proportional to 126,009.40, 188,892.60 and 72,646.60

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Solution

The fourth proportional to 126,009.40, 188,892.60 and 72,646.60 is: 108,899.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,009.40 : 188,892.60 = 72,646.60 : x
  2. Step 2: Convert to fraction form
    126,009.40/188,892.60 = 72,646.60/x
  3. Step 3: Cross multiply
    126,009.40x = 188,892.60 × 72,646.60
  4. Step 4: Simplify right side
    126,009.40x = 13,722,405,155.16
  5. Step 5: Solve for x
    x = 13,722,405,155.16/126,009.40
  6. Step 6: Final answer
    x = 108,899.85

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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.