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Finding the Fourth Proportional to 131,074.66, 180,880.86 and 72,929.22

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Solution

The fourth proportional to 131,074.66, 180,880.86 and 72,929.22 is: 100,641.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,074.66 : 180,880.86 = 72,929.22 : x
  2. Step 2: Convert to fraction form
    131,074.66/180,880.86 = 72,929.22/x
  3. Step 3: Cross multiply
    131,074.66x = 180,880.86 × 72,929.22
  4. Step 4: Simplify right side
    131,074.66x = 13,191,500,032.73
  5. Step 5: Solve for x
    x = 13,191,500,032.73/131,074.66
  6. Step 6: Final answer
    x = 100,641.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.