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Finding the Fourth Proportional to 78,492.42, 108,604.77 and 68,441.81

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Solution

The fourth proportional to 78,492.42, 108,604.77 and 68,441.81 is: 94,698.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,492.42 : 108,604.77 = 68,441.81 : x
  2. Step 2: Convert to fraction form
    78,492.42/108,604.77 = 68,441.81/x
  3. Step 3: Cross multiply
    78,492.42x = 108,604.77 × 68,441.81
  4. Step 4: Simplify right side
    78,492.42x = 7,433,106,490.41
  5. Step 5: Solve for x
    x = 7,433,106,490.41/78,492.42
  6. Step 6: Final answer
    x = 94,698.40

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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.