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Finding the Fourth Proportional to 140,197.80, 210,296.70 and 84,210.60

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Solution

The fourth proportional to 140,197.80, 210,296.70 and 84,210.60 is: 126,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,197.80 : 210,296.70 = 84,210.60 : x
  2. Step 2: Convert to fraction form
    140,197.80/210,296.70 = 84,210.60/x
  3. Step 3: Cross multiply
    140,197.80x = 210,296.70 × 84,210.60
  4. Step 4: Simplify right side
    140,197.80x = 17,709,211,285.02
  5. Step 5: Solve for x
    x = 17,709,211,285.02/140,197.80
  6. Step 6: Final answer
    x = 126,315.90

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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.