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Finding the Fourth Proportional to 61,245.80, 91,868.70 and 21,806.90

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Solution

The fourth proportional to 61,245.80, 91,868.70 and 21,806.90 is: 32,710.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,245.80 : 91,868.70 = 21,806.90 : x
  2. Step 2: Convert to fraction form
    61,245.80/91,868.70 = 21,806.90/x
  3. Step 3: Cross multiply
    61,245.80x = 91,868.70 × 21,806.90
  4. Step 4: Simplify right side
    61,245.80x = 2,003,371,554.03
  5. Step 5: Solve for x
    x = 2,003,371,554.03/61,245.80
  6. Step 6: Final answer
    x = 32,710.35

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1.5x scale

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.