Home / 129,087.69-178,143.30-71,732.31

Finding the Fourth Proportional to 129,087.69, 178,143.30 and 71,732.31

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Solution

The fourth proportional to 129,087.69, 178,143.30 and 71,732.31 is: 98,991.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,087.69 : 178,143.30 = 71,732.31 : x
  2. Step 2: Convert to fraction form
    129,087.69/178,143.30 = 71,732.31/x
  3. Step 3: Cross multiply
    129,087.69x = 178,143.30 × 71,732.31
  4. Step 4: Simplify right side
    129,087.69x = 12,778,630,420.02
  5. Step 5: Solve for x
    x = 12,778,630,420.02/129,087.69
  6. Step 6: Final answer
    x = 98,991.86

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1.5x scale

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.