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Finding the Fourth Proportional to 60,780.84, 91,211.99 and 21,338.07

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Solution

The fourth proportional to 60,780.84, 91,211.99 and 21,338.07 is: 32,021.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,780.84 : 91,211.99 = 21,338.07 : x
  2. Step 2: Convert to fraction form
    60,780.84/91,211.99 = 21,338.07/x
  3. Step 3: Cross multiply
    60,780.84x = 91,211.99 × 21,338.07
  4. Step 4: Simplify right side
    60,780.84x = 1,946,287,720.77
  5. Step 5: Solve for x
    x = 1,946,287,720.77/60,780.84
  6. Step 6: Final answer
    x = 32,021.40

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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.