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Finding the Fourth Proportional to 136,348.32, 188,147.28 and 79,748.64

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Solution

The fourth proportional to 136,348.32, 188,147.28 and 79,748.64 is: 110,045.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,348.32 : 188,147.28 = 79,748.64 : x
  2. Step 2: Convert to fraction form
    136,348.32/188,147.28 = 79,748.64/x
  3. Step 3: Cross multiply
    136,348.32x = 188,147.28 × 79,748.64
  4. Step 4: Simplify right side
    136,348.32x = 15,004,489,699.70
  5. Step 5: Solve for x
    x = 15,004,489,699.70/136,348.32
  6. Step 6: Final answer
    x = 110,045.28

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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.