Home / 429,036.28-643,638.30-129,541.24

Finding the Fourth Proportional to 429,036.28, 643,638.30 and 129,541.24

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Solution

The fourth proportional to 429,036.28, 643,638.30 and 129,541.24 is: 194,337.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,036.28 : 643,638.30 = 129,541.24 : x
  2. Step 2: Convert to fraction form
    429,036.28/643,638.30 = 129,541.24/x
  3. Step 3: Cross multiply
    429,036.28x = 643,638.30 × 129,541.24
  4. Step 4: Simplify right side
    429,036.28x = 83,377,703,493.49
  5. Step 5: Solve for x
    x = 83,377,703,493.49/429,036.28
  6. Step 6: Final answer
    x = 194,337.19

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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.