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Finding the Fourth Proportional to 225,707.51, 311,498.63 and 128,925.83

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Solution

The fourth proportional to 225,707.51, 311,498.63 and 128,925.83 is: 177,930.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,707.51 : 311,498.63 = 128,925.83 : x
  2. Step 2: Convert to fraction form
    225,707.51/311,498.63 = 128,925.83/x
  3. Step 3: Cross multiply
    225,707.51x = 311,498.63 × 128,925.83
  4. Step 4: Simplify right side
    225,707.51x = 40,160,220,517.67
  5. Step 5: Solve for x
    x = 40,160,220,517.67/225,707.51
  6. Step 6: Final answer
    x = 177,930.37

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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.