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Finding the Fourth Proportional to 225,325.96, 310,983.98 and 128,529.34

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Solution

The fourth proportional to 225,325.96, 310,983.98 and 128,529.34 is: 177,389.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,325.96 : 310,983.98 = 128,529.34 : x
  2. Step 2: Convert to fraction form
    225,325.96/310,983.98 = 128,529.34/x
  3. Step 3: Cross multiply
    225,325.96x = 310,983.98 × 128,529.34
  4. Step 4: Simplify right side
    225,325.96x = 39,970,564,279.87
  5. Step 5: Solve for x
    x = 39,970,564,279.87/225,325.96
  6. Step 6: Final answer
    x = 177,389.97

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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.