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Finding the Fourth Proportional to 93,131.12, 128,523.80 and 65,955.92

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Solution

The fourth proportional to 93,131.12, 128,523.80 and 65,955.92 is: 91,021.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,131.12 : 128,523.80 = 65,955.92 : x
  2. Step 2: Convert to fraction form
    93,131.12/128,523.80 = 65,955.92/x
  3. Step 3: Cross multiply
    93,131.12x = 128,523.80 × 65,955.92
  4. Step 4: Simplify right side
    93,131.12x = 8,476,904,993.17
  5. Step 5: Solve for x
    x = 8,476,904,993.17/93,131.12
  6. Step 6: Final answer
    x = 91,021.18

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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.