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Finding the Fourth Proportional to 51,333.78, 70,839.15 and 28,672.11

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Solution

The fourth proportional to 51,333.78, 70,839.15 and 28,672.11 is: 39,566.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,333.78 : 70,839.15 = 28,672.11 : x
  2. Step 2: Convert to fraction form
    51,333.78/70,839.15 = 28,672.11/x
  3. Step 3: Cross multiply
    51,333.78x = 70,839.15 × 28,672.11
  4. Step 4: Simplify right side
    51,333.78x = 2,031,107,901.11
  5. Step 5: Solve for x
    x = 2,031,107,901.11/51,333.78
  6. Step 6: Final answer
    x = 39,566.69

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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.