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Finding the Fourth Proportional to 136,830.80, 188,772.84 and 79,460.30

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Solution

The fourth proportional to 136,830.80, 188,772.84 and 79,460.30 is: 109,624.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,830.80 : 188,772.84 = 79,460.30 : x
  2. Step 2: Convert to fraction form
    136,830.80/188,772.84 = 79,460.30/x
  3. Step 3: Cross multiply
    136,830.80x = 188,772.84 × 79,460.30
  4. Step 4: Simplify right side
    136,830.80x = 14,999,946,498.25
  5. Step 5: Solve for x
    x = 14,999,946,498.25/136,830.80
  6. Step 6: Final answer
    x = 109,624.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.