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Finding the Fourth Proportional to 113,620, 156,631.64 and 79,522.96

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Solution

The fourth proportional to 113,620, 156,631.64 and 79,522.96 is: 109,626.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,620 : 156,631.64 = 79,522.96 : x
  2. Step 2: Convert to fraction form
    113,620/156,631.64 = 79,522.96/x
  3. Step 3: Cross multiply
    113,620x = 156,631.64 × 79,522.96
  4. Step 4: Simplify right side
    113,620x = 12,455,811,642.45
  5. Step 5: Solve for x
    x = 12,455,811,642.45/113,620
  6. Step 6: Final answer
    x = 109,626.93

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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.