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Finding the Fourth Proportional to 225,133.96, 310,692.21 and 128,336.05

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Solution

The fourth proportional to 225,133.96, 310,692.21 and 128,336.05 is: 177,107.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,133.96 : 310,692.21 = 128,336.05 : x
  2. Step 2: Convert to fraction form
    225,133.96/310,692.21 = 128,336.05/x
  3. Step 3: Cross multiply
    225,133.96x = 310,692.21 × 128,336.05
  4. Step 4: Simplify right side
    225,133.96x = 39,873,009,156.63
  5. Step 5: Solve for x
    x = 39,873,009,156.63/225,133.96
  6. Step 6: Final answer
    x = 177,107.93

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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.