Home / 429,020.55-643,535.69-129,504.02

Finding the Fourth Proportional to 429,020.55, 643,535.69 and 129,504.02

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Solution

The fourth proportional to 429,020.55, 643,535.69 and 129,504.02 is: 194,257.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,020.55 : 643,535.69 = 129,504.02 : x
  2. Step 2: Convert to fraction form
    429,020.55/643,535.69 = 129,504.02/x
  3. Step 3: Cross multiply
    429,020.55x = 643,535.69 × 129,504.02
  4. Step 4: Simplify right side
    429,020.55x = 83,340,455,003.28
  5. Step 5: Solve for x
    x = 83,340,455,003.28/429,020.55
  6. Step 6: Final answer
    x = 194,257.49

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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.