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Finding the Fourth Proportional to 85,734.99, 128,685.33 and 41,392.98

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Solution

The fourth proportional to 85,734.99, 128,685.33 and 41,392.98 is: 62,129.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,734.99 : 128,685.33 = 41,392.98 : x
  2. Step 2: Convert to fraction form
    85,734.99/128,685.33 = 41,392.98/x
  3. Step 3: Cross multiply
    85,734.99x = 128,685.33 × 41,392.98
  4. Step 4: Simplify right side
    85,734.99x = 5,326,669,290.98
  5. Step 5: Solve for x
    x = 5,326,669,290.98/85,734.99
  6. Step 6: Final answer
    x = 62,129.47

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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.