Home / 128,415.45-177,209.90-71,053.27

Finding the Fourth Proportional to 128,415.45, 177,209.90 and 71,053.27

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Solution

The fourth proportional to 128,415.45, 177,209.90 and 71,053.27 is: 98,051.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,415.45 : 177,209.90 = 71,053.27 : x
  2. Step 2: Convert to fraction form
    128,415.45/177,209.90 = 71,053.27/x
  3. Step 3: Cross multiply
    128,415.45x = 177,209.90 × 71,053.27
  4. Step 4: Simplify right side
    128,415.45x = 12,591,342,871.37
  5. Step 5: Solve for x
    x = 12,591,342,871.37/128,415.45
  6. Step 6: Final answer
    x = 98,051.62

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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.