Home / 128,811.99-177,726.90-74,350.83

Finding the Fourth Proportional to 128,811.99, 177,726.90 and 74,350.83

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Solution

The fourth proportional to 128,811.99, 177,726.90 and 74,350.83 is: 102,584.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,811.99 : 177,726.90 = 74,350.83 : x
  2. Step 2: Convert to fraction form
    128,811.99/177,726.90 = 74,350.83/x
  3. Step 3: Cross multiply
    128,811.99x = 177,726.90 × 74,350.83
  4. Step 4: Simplify right side
    128,811.99x = 13,214,142,528.33
  5. Step 5: Solve for x
    x = 13,214,142,528.33/128,811.99
  6. Step 6: Final answer
    x = 102,584.72

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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.