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Finding the Fourth Proportional to 93,211.94, 128,578.02 and 65,957.42

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Solution

The fourth proportional to 93,211.94, 128,578.02 and 65,957.42 is: 90,982.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,211.94 : 128,578.02 = 65,957.42 : x
  2. Step 2: Convert to fraction form
    93,211.94/128,578.02 = 65,957.42/x
  3. Step 3: Cross multiply
    93,211.94x = 128,578.02 × 65,957.42
  4. Step 4: Simplify right side
    93,211.94x = 8,480,674,467.91
  5. Step 5: Solve for x
    x = 8,480,674,467.91/93,211.94
  6. Step 6: Final answer
    x = 90,982.71

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1.5x scale

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.