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Finding the Fourth Proportional to 72,881.76, 109,252.92 and 28,493.76

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Solution

The fourth proportional to 72,881.76, 109,252.92 and 28,493.76 is: 42,713.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,881.76 : 109,252.92 = 28,493.76 : x
  2. Step 2: Convert to fraction form
    72,881.76/109,252.92 = 28,493.76/x
  3. Step 3: Cross multiply
    72,881.76x = 109,252.92 × 28,493.76
  4. Step 4: Simplify right side
    72,881.76x = 3,113,026,481.78
  5. Step 5: Solve for x
    x = 3,113,026,481.78/72,881.76
  6. Step 6: Final answer
    x = 42,713.38

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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.