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Finding the Fourth Proportional to 93,639.70, 140,459.55 and 81,975.70

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Solution

The fourth proportional to 93,639.70, 140,459.55 and 81,975.70 is: 122,963.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,639.70 : 140,459.55 = 81,975.70 : x
  2. Step 2: Convert to fraction form
    93,639.70/140,459.55 = 81,975.70/x
  3. Step 3: Cross multiply
    93,639.70x = 140,459.55 × 81,975.70
  4. Step 4: Simplify right side
    93,639.70x = 11,514,269,932.94
  5. Step 5: Solve for x
    x = 11,514,269,932.94/93,639.70
  6. Step 6: Final answer
    x = 122,963.55

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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.