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Finding the Fourth Proportional to 58,645.64, 80,940.66 and 39,770.12

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Solution

The fourth proportional to 58,645.64, 80,940.66 and 39,770.12 is: 54,889.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,645.64 : 80,940.66 = 39,770.12 : x
  2. Step 2: Convert to fraction form
    58,645.64/80,940.66 = 39,770.12/x
  3. Step 3: Cross multiply
    58,645.64x = 80,940.66 × 39,770.12
  4. Step 4: Simplify right side
    58,645.64x = 3,219,019,761.08
  5. Step 5: Solve for x
    x = 3,219,019,761.08/58,645.64
  6. Step 6: Final answer
    x = 54,889.33

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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.