Home / 128,555.13-177,384.96-80,774.64

Finding the Fourth Proportional to 128,555.13, 177,384.96 and 80,774.64

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Solution

The fourth proportional to 128,555.13, 177,384.96 and 80,774.64 is: 111,455.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555.13 : 177,384.96 = 80,774.64 : x
  2. Step 2: Convert to fraction form
    128,555.13/177,384.96 = 80,774.64/x
  3. Step 3: Cross multiply
    128,555.13x = 177,384.96 × 80,774.64
  4. Step 4: Simplify right side
    128,555.13x = 14,328,206,285.41
  5. Step 5: Solve for x
    x = 14,328,206,285.41/128,555.13
  6. Step 6: Final answer
    x = 111,455.73

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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.