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Finding the Fourth Proportional to 79,689.48, 109,956.45 and 49,482.15

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Solution

The fourth proportional to 79,689.48, 109,956.45 and 49,482.15 is: 68,276.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.48 : 109,956.45 = 49,482.15 : x
  2. Step 2: Convert to fraction form
    79,689.48/109,956.45 = 49,482.15/x
  3. Step 3: Cross multiply
    79,689.48x = 109,956.45 × 49,482.15
  4. Step 4: Simplify right side
    79,689.48x = 5,440,881,552.37
  5. Step 5: Solve for x
    x = 5,440,881,552.37/79,689.48
  6. Step 6: Final answer
    x = 68,276.03

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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.