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Finding the Fourth Proportional to 81,478.62, 112,443.75 and 45,668.37

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Solution

The fourth proportional to 81,478.62, 112,443.75 and 45,668.37 is: 63,024.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,478.62 : 112,443.75 = 45,668.37 : x
  2. Step 2: Convert to fraction form
    81,478.62/112,443.75 = 45,668.37/x
  3. Step 3: Cross multiply
    81,478.62x = 112,443.75 × 45,668.37
  4. Step 4: Simplify right side
    81,478.62x = 5,135,122,779.19
  5. Step 5: Solve for x
    x = 5,135,122,779.19/81,478.62
  6. Step 6: Final answer
    x = 63,024.17

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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.