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Finding the Fourth Proportional to 423,073.56, 634,669.74 and 123,576.12

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Solution

The fourth proportional to 423,073.56, 634,669.74 and 123,576.12 is: 185,381.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,073.56 : 634,669.74 = 123,576.12 : x
  2. Step 2: Convert to fraction form
    423,073.56/634,669.74 = 123,576.12/x
  3. Step 3: Cross multiply
    423,073.56x = 634,669.74 × 123,576.12
  4. Step 4: Simplify right side
    423,073.56x = 78,430,023,950.61
  5. Step 5: Solve for x
    x = 78,430,023,950.61/423,073.56
  6. Step 6: Final answer
    x = 185,381.53

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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.