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Finding the Fourth Proportional to 72,749.52, 109,080.36 and 28,367.76

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Solution

The fourth proportional to 72,749.52, 109,080.36 and 28,367.76 is: 42,534.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,749.52 : 109,080.36 = 28,367.76 : x
  2. Step 2: Convert to fraction form
    72,749.52/109,080.36 = 28,367.76/x
  3. Step 3: Cross multiply
    72,749.52x = 109,080.36 × 28,367.76
  4. Step 4: Simplify right side
    72,749.52x = 3,094,365,473.19
  5. Step 5: Solve for x
    x = 3,094,365,473.19/72,749.52
  6. Step 6: Final answer
    x = 42,534.51

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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.