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Finding the Fourth Proportional to 91,706.80, 137,560.20 and 79,022.20

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Solution

The fourth proportional to 91,706.80, 137,560.20 and 79,022.20 is: 118,533.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,706.80 : 137,560.20 = 79,022.20 : x
  2. Step 2: Convert to fraction form
    91,706.80/137,560.20 = 79,022.20/x
  3. Step 3: Cross multiply
    91,706.80x = 137,560.20 × 79,022.20
  4. Step 4: Simplify right side
    91,706.80x = 10,870,309,636.44
  5. Step 5: Solve for x
    x = 10,870,309,636.44/91,706.80
  6. Step 6: Final answer
    x = 118,533.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.