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Finding the Fourth Proportional to 71,281.80, 106,922.70 and 66,616.20

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Solution

The fourth proportional to 71,281.80, 106,922.70 and 66,616.20 is: 99,924.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,281.80 : 106,922.70 = 66,616.20 : x
  2. Step 2: Convert to fraction form
    71,281.80/106,922.70 = 66,616.20/x
  3. Step 3: Cross multiply
    71,281.80x = 106,922.70 × 66,616.20
  4. Step 4: Simplify right side
    71,281.80x = 7,122,783,967.74
  5. Step 5: Solve for x
    x = 7,122,783,967.74/71,281.80
  6. Step 6: Final answer
    x = 99,924.30

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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.