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Finding the Fourth Proportional to 225,288.96, 310,933.68 and 128,492.96

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Solution

The fourth proportional to 225,288.96, 310,933.68 and 128,492.96 is: 177,340.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,288.96 : 310,933.68 = 128,492.96 : x
  2. Step 2: Convert to fraction form
    225,288.96/310,933.68 = 128,492.96/x
  3. Step 3: Cross multiply
    225,288.96x = 310,933.68 × 128,492.96
  4. Step 4: Simplify right side
    225,288.96x = 39,952,788,906.89
  5. Step 5: Solve for x
    x = 39,952,788,906.89/225,288.96
  6. Step 6: Final answer
    x = 177,340.20

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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.