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Finding the Fourth Proportional to 91,694.66, 136,921.16 and 72,762.16

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Solution

The fourth proportional to 91,694.66, 136,921.16 and 72,762.16 is: 108,650.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,694.66 : 136,921.16 = 72,762.16 : x
  2. Step 2: Convert to fraction form
    91,694.66/136,921.16 = 72,762.16/x
  3. Step 3: Cross multiply
    91,694.66x = 136,921.16 × 72,762.16
  4. Step 4: Simplify right side
    91,694.66x = 9,962,679,351.31
  5. Step 5: Solve for x
    x = 9,962,679,351.31/91,694.66
  6. Step 6: Final answer
    x = 108,650.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.