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Finding the Fourth Proportional to 72,540.91, 100,116.23 and 40,711.56

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Solution

The fourth proportional to 72,540.91, 100,116.23 and 40,711.56 is: 56,187.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,540.91 : 100,116.23 = 40,711.56 : x
  2. Step 2: Convert to fraction form
    72,540.91/100,116.23 = 40,711.56/x
  3. Step 3: Cross multiply
    72,540.91x = 100,116.23 × 40,711.56
  4. Step 4: Simplify right side
    72,540.91x = 4,075,887,904.62
  5. Step 5: Solve for x
    x = 4,075,887,904.62/72,540.91
  6. Step 6: Final answer
    x = 56,187.44

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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.