Home / 429,132.60-643,709.85-129,622.95

Finding the Fourth Proportional to 429,132.60, 643,709.85 and 129,622.95

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Solution

The fourth proportional to 429,132.60, 643,709.85 and 129,622.95 is: 194,437.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,132.60 : 643,709.85 = 129,622.95 : x
  2. Step 2: Convert to fraction form
    429,132.60/643,709.85 = 129,622.95/x
  3. Step 3: Cross multiply
    429,132.60x = 643,709.85 × 129,622.95
  4. Step 4: Simplify right side
    429,132.60x = 83,439,569,052.94
  5. Step 5: Solve for x
    x = 83,439,569,052.94/429,132.60
  6. Step 6: Final answer
    x = 194,437.73

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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.