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Finding the Fourth Proportional to 80,597.40, 120,929.16 and 42,636.77

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Solution

The fourth proportional to 80,597.40, 120,929.16 and 42,636.77 is: 63,972.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,597.40 : 120,929.16 = 42,636.77 : x
  2. Step 2: Convert to fraction form
    80,597.40/120,929.16 = 42,636.77/x
  3. Step 3: Cross multiply
    80,597.40x = 120,929.16 × 42,636.77
  4. Step 4: Simplify right side
    80,597.40x = 5,156,028,176.57
  5. Step 5: Solve for x
    x = 5,156,028,176.57/80,597.40
  6. Step 6: Final answer
    x = 63,972.64

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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.