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Finding the Fourth Proportional to 93,215.82, 128,713.78 and 75,990.96

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Solution

The fourth proportional to 93,215.82, 128,713.78 and 75,990.96 is: 104,929.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,215.82 : 128,713.78 = 75,990.96 : x
  2. Step 2: Convert to fraction form
    93,215.82/128,713.78 = 75,990.96/x
  3. Step 3: Cross multiply
    93,215.82x = 128,713.78 × 75,990.96
  4. Step 4: Simplify right side
    93,215.82x = 9,781,083,707.43
  5. Step 5: Solve for x
    x = 9,781,083,707.43/93,215.82
  6. Step 6: Final answer
    x = 104,929.44

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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.