Home / 129,695.90-178,976.70-72,336.96

Finding the Fourth Proportional to 129,695.90, 178,976.70 and 72,336.96

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Solution

The fourth proportional to 129,695.90, 178,976.70 and 72,336.96 is: 99,822.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,695.90 : 178,976.70 = 72,336.96 : x
  2. Step 2: Convert to fraction form
    129,695.90/178,976.70 = 72,336.96/x
  3. Step 3: Cross multiply
    129,695.90x = 178,976.70 × 72,336.96
  4. Step 4: Simplify right side
    129,695.90x = 12,946,630,388.83
  5. Step 5: Solve for x
    x = 12,946,630,388.83/129,695.90
  6. Step 6: Final answer
    x = 99,822.97

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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.