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Finding the Fourth Proportional to 125,816.69, 173,631.81 and 72,112.07

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Solution

The fourth proportional to 125,816.69, 173,631.81 and 72,112.07 is: 99,517.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,816.69 : 173,631.81 = 72,112.07 : x
  2. Step 2: Convert to fraction form
    125,816.69/173,631.81 = 72,112.07/x
  3. Step 3: Cross multiply
    125,816.69x = 173,631.81 × 72,112.07
  4. Step 4: Simplify right side
    125,816.69x = 12,520,948,368.79
  5. Step 5: Solve for x
    x = 12,520,948,368.79/125,816.69
  6. Step 6: Final answer
    x = 99,517.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.