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Finding the Fourth Proportional to 129,771.20, 194,656.80 and 55,899.20

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Solution

The fourth proportional to 129,771.20, 194,656.80 and 55,899.20 is: 83,848.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,771.20 : 194,656.80 = 55,899.20 : x
  2. Step 2: Convert to fraction form
    129,771.20/194,656.80 = 55,899.20/x
  3. Step 3: Cross multiply
    129,771.20x = 194,656.80 × 55,899.20
  4. Step 4: Simplify right side
    129,771.20x = 10,881,159,394.56
  5. Step 5: Solve for x
    x = 10,881,159,394.56/129,771.20
  6. Step 6: Final answer
    x = 83,848.80

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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.