Home / 128,017.72-176,615.18-80,187.80

Finding the Fourth Proportional to 128,017.72, 176,615.18 and 80,187.80

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Solution

The fourth proportional to 128,017.72, 176,615.18 and 80,187.80 is: 110,628.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017.72 : 176,615.18 = 80,187.80 : x
  2. Step 2: Convert to fraction form
    128,017.72/176,615.18 = 80,187.80/x
  3. Step 3: Cross multiply
    128,017.72x = 176,615.18 × 80,187.80
  4. Step 4: Simplify right side
    128,017.72x = 14,162,382,730.80
  5. Step 5: Solve for x
    x = 14,162,382,730.80/128,017.72
  6. Step 6: Final answer
    x = 110,628.30

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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.