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Finding the Fourth Proportional to 81,761.69, 112,840.47 and 45,466.74

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Solution

The fourth proportional to 81,761.69, 112,840.47 and 45,466.74 is: 62,749.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,761.69 : 112,840.47 = 45,466.74 : x
  2. Step 2: Convert to fraction form
    81,761.69/112,840.47 = 45,466.74/x
  3. Step 3: Cross multiply
    81,761.69x = 112,840.47 × 45,466.74
  4. Step 4: Simplify right side
    81,761.69x = 5,130,488,310.97
  5. Step 5: Solve for x
    x = 5,130,488,310.97/81,761.69
  6. Step 6: Final answer
    x = 62,749.30

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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.