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Finding the Fourth Proportional to 75,152.70, 112,728.26 and 18,991.66

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Solution

The fourth proportional to 75,152.70, 112,728.26 and 18,991.66 is: 28,487.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,152.70 : 112,728.26 = 18,991.66 : x
  2. Step 2: Convert to fraction form
    75,152.70/112,728.26 = 18,991.66/x
  3. Step 3: Cross multiply
    75,152.70x = 112,728.26 × 18,991.66
  4. Step 4: Simplify right side
    75,152.70x = 2,140,896,786.31
  5. Step 5: Solve for x
    x = 2,140,896,786.31/75,152.70
  6. Step 6: Final answer
    x = 28,487.29

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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.