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Finding the Fourth Proportional to 93,107.88, 128,639.37 and 64,939.32

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Solution

The fourth proportional to 93,107.88, 128,639.37 and 64,939.32 is: 89,721.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,107.88 : 128,639.37 = 64,939.32 : x
  2. Step 2: Convert to fraction form
    93,107.88/128,639.37 = 64,939.32/x
  3. Step 3: Cross multiply
    93,107.88x = 128,639.37 × 64,939.32
  4. Step 4: Simplify right side
    93,107.88x = 8,353,753,213.03
  5. Step 5: Solve for x
    x = 8,353,753,213.03/93,107.88
  6. Step 6: Final answer
    x = 89,721.23

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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.