Home / 128,794.17-177,741.99-80,424.72

Finding the Fourth Proportional to 128,794.17, 177,741.99 and 80,424.72

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Solution

The fourth proportional to 128,794.17, 177,741.99 and 80,424.72 is: 110,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,794.17 : 177,741.99 = 80,424.72 : x
  2. Step 2: Convert to fraction form
    128,794.17/177,741.99 = 80,424.72/x
  3. Step 3: Cross multiply
    128,794.17x = 177,741.99 × 80,424.72
  4. Step 4: Simplify right side
    128,794.17x = 14,294,849,777.99
  5. Step 5: Solve for x
    x = 14,294,849,777.99/128,794.17
  6. Step 6: Final answer
    x = 110,989.88

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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.