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Finding the Fourth Proportional to 125,439.52, 173,187.64 and 77,743.52

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Solution

The fourth proportional to 125,439.52, 173,187.64 and 77,743.52 is: 107,336.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,439.52 : 173,187.64 = 77,743.52 : x
  2. Step 2: Convert to fraction form
    125,439.52/173,187.64 = 77,743.52/x
  3. Step 3: Cross multiply
    125,439.52x = 173,187.64 × 77,743.52
  4. Step 4: Simplify right side
    125,439.52x = 13,464,216,754.09
  5. Step 5: Solve for x
    x = 13,464,216,754.09/125,439.52
  6. Step 6: Final answer
    x = 107,336.32

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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.