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Finding the Fourth Proportional to 64,891.50, 89,559.99 and 39,755.58

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Solution

The fourth proportional to 64,891.50, 89,559.99 and 39,755.58 is: 54,868.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,891.50 : 89,559.99 = 39,755.58 : x
  2. Step 2: Convert to fraction form
    64,891.50/89,559.99 = 39,755.58/x
  3. Step 3: Cross multiply
    64,891.50x = 89,559.99 × 39,755.58
  4. Step 4: Simplify right side
    64,891.50x = 3,560,509,347.24
  5. Step 5: Solve for x
    x = 3,560,509,347.24/64,891.50
  6. Step 6: Final answer
    x = 54,868.66

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1.5x scale

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.