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Finding the Fourth Proportional to 93,696.42, 140,423.85 and 81,639.69

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Solution

The fourth proportional to 93,696.42, 140,423.85 and 81,639.69 is: 122,354.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,696.42 : 140,423.85 = 81,639.69 : x
  2. Step 2: Convert to fraction form
    93,696.42/140,423.85 = 81,639.69/x
  3. Step 3: Cross multiply
    93,696.42x = 140,423.85 × 81,639.69
  4. Step 4: Simplify right side
    93,696.42x = 11,464,159,582.61
  5. Step 5: Solve for x
    x = 11,464,159,582.61/93,696.42
  6. Step 6: Final answer
    x = 122,354.30

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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.