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Finding the Fourth Proportional to 128,525.87, 177,365.66 and 71,937.25

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Solution

The fourth proportional to 128,525.87, 177,365.66 and 71,937.25 is: 99,273.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525.87 : 177,365.66 = 71,937.25 : x
  2. Step 2: Convert to fraction form
    128,525.87/177,365.66 = 71,937.25/x
  3. Step 3: Cross multiply
    128,525.87x = 177,365.66 × 71,937.25
  4. Step 4: Simplify right side
    128,525.87x = 12,759,197,021.73
  5. Step 5: Solve for x
    x = 12,759,197,021.73/128,525.87
  6. Step 6: Final answer
    x = 99,273.37

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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.