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Finding the Fourth Proportional to 79,689.48, 109,956.44 and 49,482.16

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Solution

The fourth proportional to 79,689.48, 109,956.44 and 49,482.16 is: 68,276.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.48 : 109,956.44 = 49,482.16 : x
  2. Step 2: Convert to fraction form
    79,689.48/109,956.44 = 49,482.16/x
  3. Step 3: Cross multiply
    79,689.48x = 109,956.44 × 49,482.16
  4. Step 4: Simplify right side
    79,689.48x = 5,440,882,157.11
  5. Step 5: Solve for x
    x = 5,440,882,157.11/79,689.48
  6. Step 6: Final answer
    x = 68,276.04

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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.