Home / 128,259.66-176,998.05-71,671.04

Finding the Fourth Proportional to 128,259.66, 176,998.05 and 71,671.04

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Solution

The fourth proportional to 128,259.66, 176,998.05 and 71,671.04 is: 98,905.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,259.66 : 176,998.05 = 71,671.04 : x
  2. Step 2: Convert to fraction form
    128,259.66/176,998.05 = 71,671.04/x
  3. Step 3: Cross multiply
    128,259.66x = 176,998.05 × 71,671.04
  4. Step 4: Simplify right side
    128,259.66x = 12,685,633,436.48
  5. Step 5: Solve for x
    x = 12,685,633,436.48/128,259.66
  6. Step 6: Final answer
    x = 98,905.87

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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.