Home / 126,485.15-189,287.58-78,431.29

Finding the Fourth Proportional to 126,485.15, 189,287.58 and 78,431.29

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Solution

The fourth proportional to 126,485.15, 189,287.58 and 78,431.29 is: 117,374.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,485.15 : 189,287.58 = 78,431.29 : x
  2. Step 2: Convert to fraction form
    126,485.15/189,287.58 = 78,431.29/x
  3. Step 3: Cross multiply
    126,485.15x = 189,287.58 × 78,431.29
  4. Step 4: Simplify right side
    126,485.15x = 14,846,068,901.28
  5. Step 5: Solve for x
    x = 14,846,068,901.28/126,485.15
  6. Step 6: Final answer
    x = 117,374.01

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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.