Home / 128,309.85-177,052.13-70,941.42

Finding the Fourth Proportional to 128,309.85, 177,052.13 and 70,941.42

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Solution

The fourth proportional to 128,309.85, 177,052.13 and 70,941.42 is: 97,890.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309.85 : 177,052.13 = 70,941.42 : x
  2. Step 2: Convert to fraction form
    128,309.85/177,052.13 = 70,941.42/x
  3. Step 3: Cross multiply
    128,309.85x = 177,052.13 × 70,941.42
  4. Step 4: Simplify right side
    128,309.85x = 12,560,328,630.96
  5. Step 5: Solve for x
    x = 12,560,328,630.96/128,309.85
  6. Step 6: Final answer
    x = 97,890.61

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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.