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Finding the Fourth Proportional to 93,123.38, 128,660.74 and 64,954.82

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Solution

The fourth proportional to 93,123.38, 128,660.74 and 64,954.82 is: 89,742.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,123.38 : 128,660.74 = 64,954.82 : x
  2. Step 2: Convert to fraction form
    93,123.38/128,660.74 = 64,954.82/x
  3. Step 3: Cross multiply
    93,123.38x = 128,660.74 × 64,954.82
  4. Step 4: Simplify right side
    93,123.38x = 8,357,135,207.77
  5. Step 5: Solve for x
    x = 8,357,135,207.77/93,123.38
  6. Step 6: Final answer
    x = 89,742.61

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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.