Home / 129,102.69-178,157.86-71,741.83

Finding the Fourth Proportional to 129,102.69, 178,157.86 and 71,741.83

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Solution

The fourth proportional to 129,102.69, 178,157.86 and 71,741.83 is: 99,001.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,102.69 : 178,157.86 = 71,741.83 : x
  2. Step 2: Convert to fraction form
    129,102.69/178,157.86 = 71,741.83/x
  3. Step 3: Cross multiply
    129,102.69x = 178,157.86 × 71,741.83
  4. Step 4: Simplify right side
    129,102.69x = 12,781,370,905.28
  5. Step 5: Solve for x
    x = 12,781,370,905.28/129,102.69
  6. Step 6: Final answer
    x = 99,001.58

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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.