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Finding the Fourth Proportional to 78,866.76, 108,837.78 and 43,058.28

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Solution

The fourth proportional to 78,866.76, 108,837.78 and 43,058.28 is: 59,421.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,866.76 : 108,837.78 = 43,058.28 : x
  2. Step 2: Convert to fraction form
    78,866.76/108,837.78 = 43,058.28/x
  3. Step 3: Cross multiply
    78,866.76x = 108,837.78 × 43,058.28
  4. Step 4: Simplify right side
    78,866.76x = 4,686,367,605.82
  5. Step 5: Solve for x
    x = 4,686,367,605.82/78,866.76
  6. Step 6: Final answer
    x = 59,421.33

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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.