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Finding the Fourth Proportional to 79,425.16, 109,551.40 and 67,405.72

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Solution

The fourth proportional to 79,425.16, 109,551.40 and 67,405.72 is: 92,972.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,425.16 : 109,551.40 = 67,405.72 : x
  2. Step 2: Convert to fraction form
    79,425.16/109,551.40 = 67,405.72/x
  3. Step 3: Cross multiply
    79,425.16x = 109,551.40 × 67,405.72
  4. Step 4: Simplify right side
    79,425.16x = 7,384,390,994.01
  5. Step 5: Solve for x
    x = 7,384,390,994.01/79,425.16
  6. Step 6: Final answer
    x = 92,972.94

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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.