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Finding the Fourth Proportional to 424,212.96, 636,428.79 and 124,703.31

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Solution

The fourth proportional to 424,212.96, 636,428.79 and 124,703.31 is: 187,087.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,212.96 : 636,428.79 = 124,703.31 : x
  2. Step 2: Convert to fraction form
    424,212.96/636,428.79 = 124,703.31/x
  3. Step 3: Cross multiply
    424,212.96x = 636,428.79 × 124,703.31
  4. Step 4: Simplify right side
    424,212.96x = 79,364,776,692.29
  5. Step 5: Solve for x
    x = 79,364,776,692.29/424,212.96
  6. Step 6: Final answer
    x = 187,087.11

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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.