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Finding the Fourth Proportional to 136,605.20, 205,037.40 and 84,117.20

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Solution

The fourth proportional to 136,605.20, 205,037.40 and 84,117.20 is: 126,255.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,605.20 : 205,037.40 = 84,117.20 : x
  2. Step 2: Convert to fraction form
    136,605.20/205,037.40 = 84,117.20/x
  3. Step 3: Cross multiply
    136,605.20x = 205,037.40 × 84,117.20
  4. Step 4: Simplify right side
    136,605.20x = 17,247,171,983.28
  5. Step 5: Solve for x
    x = 17,247,171,983.28/136,605.20
  6. Step 6: Final answer
    x = 126,255.60

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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.