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Finding the Fourth Proportional to 101,556.65, 152,355.49 and 69,981.84

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Solution

The fourth proportional to 101,556.65, 152,355.49 and 69,981.84 is: 104,986.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,556.65 : 152,355.49 = 69,981.84 : x
  2. Step 2: Convert to fraction form
    101,556.65/152,355.49 = 69,981.84/x
  3. Step 3: Cross multiply
    101,556.65x = 152,355.49 × 69,981.84
  4. Step 4: Simplify right side
    101,556.65x = 10,662,117,349.35
  5. Step 5: Solve for x
    x = 10,662,117,349.35/101,556.65
  6. Step 6: Final answer
    x = 104,986.89

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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.