Home / 129,260.71-178,390.56-71,910.84

Finding the Fourth Proportional to 129,260.71, 178,390.56 and 71,910.84

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Solution

The fourth proportional to 129,260.71, 178,390.56 and 71,910.84 is: 99,242.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,260.71 : 178,390.56 = 71,910.84 : x
  2. Step 2: Convert to fraction form
    129,260.71/178,390.56 = 71,910.84/x
  3. Step 3: Cross multiply
    129,260.71x = 178,390.56 × 71,910.84
  4. Step 4: Simplify right side
    129,260.71x = 12,828,214,485.15
  5. Step 5: Solve for x
    x = 12,828,214,485.15/129,260.71
  6. Step 6: Final answer
    x = 99,242.95

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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.