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Finding the Fourth Proportional to 429,124.80, 643,687.80 and 148,642.08

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Solution

The fourth proportional to 429,124.80, 643,687.80 and 148,642.08 is: 222,963.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,124.80 : 643,687.80 = 148,642.08 : x
  2. Step 2: Convert to fraction form
    429,124.80/643,687.80 = 148,642.08/x
  3. Step 3: Cross multiply
    429,124.80x = 643,687.80 × 148,642.08
  4. Step 4: Simplify right side
    429,124.80x = 95,679,093,462.62
  5. Step 5: Solve for x
    x = 95,679,093,462.62/429,124.80
  6. Step 6: Final answer
    x = 222,963.33

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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.