Home / 128,390.27-177,184.67-71,029.31

Finding the Fourth Proportional to 128,390.27, 177,184.67 and 71,029.31

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Solution

The fourth proportional to 128,390.27, 177,184.67 and 71,029.31 is: 98,023.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,390.27 : 177,184.67 = 71,029.31 : x
  2. Step 2: Convert to fraction form
    128,390.27/177,184.67 = 71,029.31/x
  3. Step 3: Cross multiply
    128,390.27x = 177,184.67 × 71,029.31
  4. Step 4: Simplify right side
    128,390.27x = 12,585,303,611.61
  5. Step 5: Solve for x
    x = 12,585,303,611.61/128,390.27
  6. Step 6: Final answer
    x = 98,023.82

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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.