Home / 128,450.24-177,268.20-71,851.76

Finding the Fourth Proportional to 128,450.24, 177,268.20 and 71,851.76

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Solution

The fourth proportional to 128,450.24, 177,268.20 and 71,851.76 is: 99,159.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,450.24 : 177,268.20 = 71,851.76 : x
  2. Step 2: Convert to fraction form
    128,450.24/177,268.20 = 71,851.76/x
  3. Step 3: Cross multiply
    128,450.24x = 177,268.20 × 71,851.76
  4. Step 4: Simplify right side
    128,450.24x = 12,737,032,162.03
  5. Step 5: Solve for x
    x = 12,737,032,162.03/128,450.24
  6. Step 6: Final answer
    x = 99,159.27

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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.