Home / 429,137.48-643,822.38-129,627.80

Finding the Fourth Proportional to 429,137.48, 643,822.38 and 129,627.80

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Solution

The fourth proportional to 429,137.48, 643,822.38 and 129,627.80 is: 194,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,137.48 : 643,822.38 = 129,627.80 : x
  2. Step 2: Convert to fraction form
    429,137.48/643,822.38 = 129,627.80/x
  3. Step 3: Cross multiply
    429,137.48x = 643,822.38 × 129,627.80
  4. Step 4: Simplify right side
    429,137.48x = 83,457,278,710.16
  5. Step 5: Solve for x
    x = 83,457,278,710.16/429,137.48
  6. Step 6: Final answer
    x = 194,476.79

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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.