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Finding the Fourth Proportional to 78,989.98, 118,472.13 and 26,399.38

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Solution

The fourth proportional to 78,989.98, 118,472.13 and 26,399.38 is: 39,594.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,989.98 : 118,472.13 = 26,399.38 : x
  2. Step 2: Convert to fraction form
    78,989.98/118,472.13 = 26,399.38/x
  3. Step 3: Cross multiply
    78,989.98x = 118,472.13 × 26,399.38
  4. Step 4: Simplify right side
    78,989.98x = 3,127,590,779.28
  5. Step 5: Solve for x
    x = 3,127,590,779.28/78,989.98
  6. Step 6: Final answer
    x = 39,594.78

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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.