Home / 128,271.11-177,014.39-71,682.48

Finding the Fourth Proportional to 128,271.11, 177,014.39 and 71,682.48

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Solution

The fourth proportional to 128,271.11, 177,014.39 and 71,682.48 is: 98,921.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,271.11 : 177,014.39 = 71,682.48 : x
  2. Step 2: Convert to fraction form
    128,271.11/177,014.39 = 71,682.48/x
  3. Step 3: Cross multiply
    128,271.11x = 177,014.39 × 71,682.48
  4. Step 4: Simplify right side
    128,271.11x = 12,688,830,112.47
  5. Step 5: Solve for x
    x = 12,688,830,112.47/128,271.11
  6. Step 6: Final answer
    x = 98,921.97

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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.