Home / 129,351.51-178,503.30-71,990.82

Finding the Fourth Proportional to 129,351.51, 178,503.30 and 71,990.82

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Solution

The fourth proportional to 129,351.51, 178,503.30 and 71,990.82 is: 99,346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,351.51 : 178,503.30 = 71,990.82 : x
  2. Step 2: Convert to fraction form
    129,351.51/178,503.30 = 71,990.82/x
  3. Step 3: Cross multiply
    129,351.51x = 178,503.30 × 71,990.82
  4. Step 4: Simplify right side
    129,351.51x = 12,850,598,047.19
  5. Step 5: Solve for x
    x = 12,850,598,047.19/129,351.51
  6. Step 6: Final answer
    x = 99,346.34

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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.