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Finding the Fourth Proportional to 103,544.70, 154,971.45 and 72,440.70

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Solution

The fourth proportional to 103,544.70, 154,971.45 and 72,440.70 is: 108,419.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,544.70 : 154,971.45 = 72,440.70 : x
  2. Step 2: Convert to fraction form
    103,544.70/154,971.45 = 72,440.70/x
  3. Step 3: Cross multiply
    103,544.70x = 154,971.45 × 72,440.70
  4. Step 4: Simplify right side
    103,544.70x = 11,226,240,318.02
  5. Step 5: Solve for x
    x = 11,226,240,318.02/103,544.70
  6. Step 6: Final answer
    x = 108,419.27

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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.