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Finding the Fourth Proportional to 128,309.10, 177,051.10 and 70,940.67

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Solution

The fourth proportional to 128,309.10, 177,051.10 and 70,940.67 is: 97,889.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309.10 : 177,051.10 = 70,940.67 : x
  2. Step 2: Convert to fraction form
    128,309.10/177,051.10 = 70,940.67/x
  3. Step 3: Cross multiply
    128,309.10x = 177,051.10 × 70,940.67
  4. Step 4: Simplify right side
    128,309.10x = 12,560,122,418.28
  5. Step 5: Solve for x
    x = 12,560,122,418.28/128,309.10
  6. Step 6: Final answer
    x = 97,889.57

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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.