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Finding the Fourth Proportional to 68,619.84, 94,703.76 and 40,328.16

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Solution

The fourth proportional to 68,619.84, 94,703.76 and 40,328.16 is: 55,657.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,619.84 : 94,703.76 = 40,328.16 : x
  2. Step 2: Convert to fraction form
    68,619.84/94,703.76 = 40,328.16/x
  3. Step 3: Cross multiply
    68,619.84x = 94,703.76 × 40,328.16
  4. Step 4: Simplify right side
    68,619.84x = 3,819,228,385.88
  5. Step 5: Solve for x
    x = 3,819,228,385.88/68,619.84
  6. Step 6: Final answer
    x = 55,657.79

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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.