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Finding the Fourth Proportional to 77,643.56, 107,104.25 and 48,913.90

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Solution

The fourth proportional to 77,643.56, 107,104.25 and 48,913.90 is: 67,473.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,643.56 : 107,104.25 = 48,913.90 : x
  2. Step 2: Convert to fraction form
    77,643.56/107,104.25 = 48,913.90/x
  3. Step 3: Cross multiply
    77,643.56x = 107,104.25 × 48,913.90
  4. Step 4: Simplify right side
    77,643.56x = 5,238,886,592.26
  5. Step 5: Solve for x
    x = 5,238,886,592.26/77,643.56
  6. Step 6: Final answer
    x = 67,473.55

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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.