Home / 128,260.12-176,998.53-71,671.50

Finding the Fourth Proportional to 128,260.12, 176,998.53 and 71,671.50

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Solution

The fourth proportional to 128,260.12, 176,998.53 and 71,671.50 is: 98,906.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,260.12 : 176,998.53 = 71,671.50 : x
  2. Step 2: Convert to fraction form
    128,260.12/176,998.53 = 71,671.50/x
  3. Step 3: Cross multiply
    128,260.12x = 176,998.53 × 71,671.50
  4. Step 4: Simplify right side
    128,260.12x = 12,685,750,142.90
  5. Step 5: Solve for x
    x = 12,685,750,142.90/128,260.12
  6. Step 6: Final answer
    x = 98,906.43

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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.