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Finding the Fourth Proportional to 125,978.81, 173,837.77 and 77,573.03

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Solution

The fourth proportional to 125,978.81, 173,837.77 and 77,573.03 is: 107,042.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,978.81 : 173,837.77 = 77,573.03 : x
  2. Step 2: Convert to fraction form
    125,978.81/173,837.77 = 77,573.03/x
  3. Step 3: Cross multiply
    125,978.81x = 173,837.77 × 77,573.03
  4. Step 4: Simplify right side
    125,978.81x = 13,485,121,484.22
  5. Step 5: Solve for x
    x = 13,485,121,484.22/125,978.81
  6. Step 6: Final answer
    x = 107,042.78

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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.