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Finding the Fourth Proportional to 79,115.42, 109,179.40 and 43,307.70

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Solution

The fourth proportional to 79,115.42, 109,179.40 and 43,307.70 is: 59,764.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,115.42 : 109,179.40 = 43,307.70 : x
  2. Step 2: Convert to fraction form
    79,115.42/109,179.40 = 43,307.70/x
  3. Step 3: Cross multiply
    79,115.42x = 109,179.40 × 43,307.70
  4. Step 4: Simplify right side
    79,115.42x = 4,728,308,701.38
  5. Step 5: Solve for x
    x = 4,728,308,701.38/79,115.42
  6. Step 6: Final answer
    x = 59,764.69

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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.