Home / 133,133.28-183,716.40-79,478.88

Finding the Fourth Proportional to 133,133.28, 183,716.40 and 79,478.88

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Solution

The fourth proportional to 133,133.28, 183,716.40 and 79,478.88 is: 109,676.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,133.28 : 183,716.40 = 79,478.88 : x
  2. Step 2: Convert to fraction form
    133,133.28/183,716.40 = 79,478.88/x
  3. Step 3: Cross multiply
    133,133.28x = 183,716.40 × 79,478.88
  4. Step 4: Simplify right side
    133,133.28x = 14,601,573,709.63
  5. Step 5: Solve for x
    x = 14,601,573,709.63/133,133.28
  6. Step 6: Final answer
    x = 109,676.36

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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.