Home / 429,133.28-643,760.09-129,579.89

Finding the Fourth Proportional to 429,133.28, 643,760.09 and 129,579.89

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Solution

The fourth proportional to 429,133.28, 643,760.09 and 129,579.89 is: 194,388.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,133.28 : 643,760.09 = 129,579.89 : x
  2. Step 2: Convert to fraction form
    429,133.28/643,760.09 = 129,579.89/x
  3. Step 3: Cross multiply
    429,133.28x = 643,760.09 × 129,579.89
  4. Step 4: Simplify right side
    429,133.28x = 83,418,361,000.69
  5. Step 5: Solve for x
    x = 83,418,361,000.69/429,133.28
  6. Step 6: Final answer
    x = 194,388.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.