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Finding the Fourth Proportional to 93,118.48, 128,653.84 and 64,949.92

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Solution

The fourth proportional to 93,118.48, 128,653.84 and 64,949.92 is: 89,735.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,118.48 : 128,653.84 = 64,949.92 : x
  2. Step 2: Convert to fraction form
    93,118.48/128,653.84 = 64,949.92/x
  3. Step 3: Cross multiply
    93,118.48x = 128,653.84 × 64,949.92
  4. Step 4: Simplify right side
    93,118.48x = 8,356,056,615.69
  5. Step 5: Solve for x
    x = 8,356,056,615.69/93,118.48
  6. Step 6: Final answer
    x = 89,735.75

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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.