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Finding the Fourth Proportional to 71,950.68, 99,289.80 and 40,118.90

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Solution

The fourth proportional to 71,950.68, 99,289.80 and 40,118.90 is: 55,362.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,950.68 : 99,289.80 = 40,118.90 : x
  2. Step 2: Convert to fraction form
    71,950.68/99,289.80 = 40,118.90/x
  3. Step 3: Cross multiply
    71,950.68x = 99,289.80 × 40,118.90
  4. Step 4: Simplify right side
    71,950.68x = 3,983,397,060.77
  5. Step 5: Solve for x
    x = 3,983,397,060.77/71,950.68
  6. Step 6: Final answer
    x = 55,362.88

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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.