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Finding the Fourth Proportional to 71,307.12, 106,729.32 and 37,979.76

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Solution

The fourth proportional to 71,307.12, 106,729.32 and 37,979.76 is: 56,846.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,307.12 : 106,729.32 = 37,979.76 : x
  2. Step 2: Convert to fraction form
    71,307.12/106,729.32 = 37,979.76/x
  3. Step 3: Cross multiply
    71,307.12x = 106,729.32 × 37,979.76
  4. Step 4: Simplify right side
    71,307.12x = 4,053,553,958.56
  5. Step 5: Solve for x
    x = 4,053,553,958.56/71,307.12
  6. Step 6: Final answer
    x = 56,846.41

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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.