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Finding the Fourth Proportional to 125,902.40, 188,999.40 and 76,038.80

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Solution

The fourth proportional to 125,902.40, 188,999.40 and 76,038.80 is: 114,146.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,902.40 : 188,999.40 = 76,038.80 : x
  2. Step 2: Convert to fraction form
    125,902.40/188,999.40 = 76,038.80/x
  3. Step 3: Cross multiply
    125,902.40x = 188,999.40 × 76,038.80
  4. Step 4: Simplify right side
    125,902.40x = 14,371,287,576.72
  5. Step 5: Solve for x
    x = 14,371,287,576.72/125,902.40
  6. Step 6: Final answer
    x = 114,146.26

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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.