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Finding the Fourth Proportional to 79,379.54, 119,038.17 and 31,985.78

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Solution

The fourth proportional to 79,379.54, 119,038.17 and 31,985.78 is: 47,966.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,379.54 : 119,038.17 = 31,985.78 : x
  2. Step 2: Convert to fraction form
    79,379.54/119,038.17 = 31,985.78/x
  3. Step 3: Cross multiply
    79,379.54x = 119,038.17 × 31,985.78
  4. Step 4: Simplify right side
    79,379.54x = 3,807,528,122.03
  5. Step 5: Solve for x
    x = 3,807,528,122.03/79,379.54
  6. Step 6: Final answer
    x = 47,966.12

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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.