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Finding the Fourth Proportional to 76,879.71, 106,091.40 and 45,047.91

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Solution

The fourth proportional to 76,879.71, 106,091.40 and 45,047.91 is: 62,164.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,879.71 : 106,091.40 = 45,047.91 : x
  2. Step 2: Convert to fraction form
    76,879.71/106,091.40 = 45,047.91/x
  3. Step 3: Cross multiply
    76,879.71x = 106,091.40 × 45,047.91
  4. Step 4: Simplify right side
    76,879.71x = 4,779,195,838.97
  5. Step 5: Solve for x
    x = 4,779,195,838.97/76,879.71
  6. Step 6: Final answer
    x = 62,164.59

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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.