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Finding the Fourth Proportional to 93,460.92, 128,960.87 and 55,215.15

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Solution

The fourth proportional to 93,460.92, 128,960.87 and 55,215.15 is: 76,187.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,460.92 : 128,960.87 = 55,215.15 : x
  2. Step 2: Convert to fraction form
    93,460.92/128,960.87 = 55,215.15/x
  3. Step 3: Cross multiply
    93,460.92x = 128,960.87 × 55,215.15
  4. Step 4: Simplify right side
    93,460.92x = 7,120,593,505.10
  5. Step 5: Solve for x
    x = 7,120,593,505.10/93,460.92
  6. Step 6: Final answer
    x = 76,187.92

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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.