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Finding the Fourth Proportional to 81,762.42, 112,748.13 and 68,328.66

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Solution

The fourth proportional to 81,762.42, 112,748.13 and 68,328.66 is: 94,223.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,762.42 : 112,748.13 = 68,328.66 : x
  2. Step 2: Convert to fraction form
    81,762.42/112,748.13 = 68,328.66/x
  3. Step 3: Cross multiply
    81,762.42x = 112,748.13 × 68,328.66
  4. Step 4: Simplify right side
    81,762.42x = 7,703,928,640.41
  5. Step 5: Solve for x
    x = 7,703,928,640.41/81,762.42
  6. Step 6: Final answer
    x = 94,223.34

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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.