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Finding the Fourth Proportional to 53,235.70, 79,687.42 and 39,211.57

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Solution

The fourth proportional to 53,235.70, 79,687.42 and 39,211.57 is: 58,694.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,235.70 : 79,687.42 = 39,211.57 : x
  2. Step 2: Convert to fraction form
    53,235.70/79,687.42 = 39,211.57/x
  3. Step 3: Cross multiply
    53,235.70x = 79,687.42 × 39,211.57
  4. Step 4: Simplify right side
    53,235.70x = 3,124,668,847.45
  5. Step 5: Solve for x
    x = 3,124,668,847.45/53,235.70
  6. Step 6: Final answer
    x = 58,694.99

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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.