Home / 129,083.77-178,135.03-71,732.43

Finding the Fourth Proportional to 129,083.77, 178,135.03 and 71,732.43

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Solution

The fourth proportional to 129,083.77, 178,135.03 and 71,732.43 is: 98,990.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,083.77 : 178,135.03 = 71,732.43 : x
  2. Step 2: Convert to fraction form
    129,083.77/178,135.03 = 71,732.43/x
  3. Step 3: Cross multiply
    129,083.77x = 178,135.03 × 71,732.43
  4. Step 4: Simplify right side
    129,083.77x = 12,778,058,570.02
  5. Step 5: Solve for x
    x = 12,778,058,570.02/129,083.77
  6. Step 6: Final answer
    x = 98,990.44

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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.