Home / 128,221.45-176,942.14-71,632.82

Finding the Fourth Proportional to 128,221.45, 176,942.14 and 71,632.82

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Solution

The fourth proportional to 128,221.45, 176,942.14 and 71,632.82 is: 98,851.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,221.45 : 176,942.14 = 71,632.82 : x
  2. Step 2: Convert to fraction form
    128,221.45/176,942.14 = 71,632.82/x
  3. Step 3: Cross multiply
    128,221.45x = 176,942.14 × 71,632.82
  4. Step 4: Simplify right side
    128,221.45x = 12,674,864,728.31
  5. Step 5: Solve for x
    x = 12,674,864,728.31/128,221.45
  6. Step 6: Final answer
    x = 98,851.36

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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.