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Finding the Fourth Proportional to 137,220.60, 205,830.90 and 67,063.80

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Solution

The fourth proportional to 137,220.60, 205,830.90 and 67,063.80 is: 100,595.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,220.60 : 205,830.90 = 67,063.80 : x
  2. Step 2: Convert to fraction form
    137,220.60/205,830.90 = 67,063.80/x
  3. Step 3: Cross multiply
    137,220.60x = 205,830.90 × 67,063.80
  4. Step 4: Simplify right side
    137,220.60x = 13,803,802,311.42
  5. Step 5: Solve for x
    x = 13,803,802,311.42/137,220.60
  6. Step 6: Final answer
    x = 100,595.70

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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.