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Finding the Fourth Proportional to 80,883.81, 121,762.47 and 72,746.10

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Solution

The fourth proportional to 80,883.81, 121,762.47 and 72,746.10 is: 109,511.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,883.81 : 121,762.47 = 72,746.10 : x
  2. Step 2: Convert to fraction form
    80,883.81/121,762.47 = 72,746.10/x
  3. Step 3: Cross multiply
    80,883.81x = 121,762.47 × 72,746.10
  4. Step 4: Simplify right side
    80,883.81x = 8,857,744,818.87
  5. Step 5: Solve for x
    x = 8,857,744,818.87/80,883.81
  6. Step 6: Final answer
    x = 109,511.96

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.