Home / 128,727.20-177,633.84-72,127.64

Finding the Fourth Proportional to 128,727.20, 177,633.84 and 72,127.64

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Solution

The fourth proportional to 128,727.20, 177,633.84 and 72,127.64 is: 99,530.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,727.20 : 177,633.84 = 72,127.64 : x
  2. Step 2: Convert to fraction form
    128,727.20/177,633.84 = 72,127.64/x
  3. Step 3: Cross multiply
    128,727.20x = 177,633.84 × 72,127.64
  4. Step 4: Simplify right side
    128,727.20x = 12,812,309,663.34
  5. Step 5: Solve for x
    x = 12,812,309,663.34/128,727.20
  6. Step 6: Final answer
    x = 99,530.71

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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.