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Finding the Fourth Proportional to 71,990.40, 99,344.52 and 40,164.69

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Solution

The fourth proportional to 71,990.40, 99,344.52 and 40,164.69 is: 55,426.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,990.40 : 99,344.52 = 40,164.69 : x
  2. Step 2: Convert to fraction form
    71,990.40/99,344.52 = 40,164.69/x
  3. Step 3: Cross multiply
    71,990.40x = 99,344.52 × 40,164.69
  4. Step 4: Simplify right side
    71,990.40x = 3,990,141,849.00
  5. Step 5: Solve for x
    x = 3,990,141,849.00/71,990.40
  6. Step 6: Final answer
    x = 55,426.03

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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.