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Finding the Fourth Proportional to 429,058.66, 643,692.04 and 129,521.34

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Solution

The fourth proportional to 429,058.66, 643,692.04 and 129,521.34 is: 194,313.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,058.66 : 643,692.04 = 129,521.34 : x
  2. Step 2: Convert to fraction form
    429,058.66/643,692.04 = 129,521.34/x
  3. Step 3: Cross multiply
    429,058.66x = 643,692.04 × 129,521.34
  4. Step 4: Simplify right side
    429,058.66x = 83,371,855,568.13
  5. Step 5: Solve for x
    x = 83,371,855,568.13/429,058.66
  6. Step 6: Final answer
    x = 194,313.42

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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.