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Finding the Fourth Proportional to 72,031.68, 108,047.04 and 18,723.84

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Solution

The fourth proportional to 72,031.68, 108,047.04 and 18,723.84 is: 28,085.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,031.68 : 108,047.04 = 18,723.84 : x
  2. Step 2: Convert to fraction form
    72,031.68/108,047.04 = 18,723.84/x
  3. Step 3: Cross multiply
    72,031.68x = 108,047.04 × 18,723.84
  4. Step 4: Simplify right side
    72,031.68x = 2,023,055,489.43
  5. Step 5: Solve for x
    x = 2,023,055,489.43/72,031.68
  6. Step 6: Final answer
    x = 28,085.64

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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.