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Finding the Fourth Proportional to 225,161.92, 310,726.72 and 129,685.76

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Solution

The fourth proportional to 225,161.92, 310,726.72 and 129,685.76 is: 178,968.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,161.92 : 310,726.72 = 129,685.76 : x
  2. Step 2: Convert to fraction form
    225,161.92/310,726.72 = 129,685.76/x
  3. Step 3: Cross multiply
    225,161.92x = 310,726.72 × 129,685.76
  4. Step 4: Simplify right side
    225,161.92x = 40,296,830,835.51
  5. Step 5: Solve for x
    x = 40,296,830,835.51/225,161.92
  6. Step 6: Final answer
    x = 178,968.23

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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.