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Finding the Fourth Proportional to 128,308.97, 177,050.93 and 70,940.54

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Solution

The fourth proportional to 128,308.97, 177,050.93 and 70,940.54 is: 97,889.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,308.97 : 177,050.93 = 70,940.54 : x
  2. Step 2: Convert to fraction form
    128,308.97/177,050.93 = 70,940.54/x
  3. Step 3: Cross multiply
    128,308.97x = 177,050.93 × 70,940.54
  4. Step 4: Simplify right side
    128,308.97x = 12,560,088,669.63
  5. Step 5: Solve for x
    x = 12,560,088,669.63/128,308.97
  6. Step 6: Final answer
    x = 97,889.41

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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.