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Finding the Fourth Proportional to 76,447.67, 105,494.22 and 42,458.31

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Solution

The fourth proportional to 76,447.67, 105,494.22 and 42,458.31 is: 58,590.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,447.67 : 105,494.22 = 42,458.31 : x
  2. Step 2: Convert to fraction form
    76,447.67/105,494.22 = 42,458.31/x
  3. Step 3: Cross multiply
    76,447.67x = 105,494.22 × 42,458.31
  4. Step 4: Simplify right side
    76,447.67x = 4,479,106,295.97
  5. Step 5: Solve for x
    x = 4,479,106,295.97/76,447.67
  6. Step 6: Final answer
    x = 58,590.49

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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.