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Finding the Fourth Proportional to 78,129.36, 107,810.80 and 43,667.73

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Solution

The fourth proportional to 78,129.36, 107,810.80 and 43,667.73 is: 60,257.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,129.36 : 107,810.80 = 43,667.73 : x
  2. Step 2: Convert to fraction form
    78,129.36/107,810.80 = 43,667.73/x
  3. Step 3: Cross multiply
    78,129.36x = 107,810.80 × 43,667.73
  4. Step 4: Simplify right side
    78,129.36x = 4,707,852,905.48
  5. Step 5: Solve for x
    x = 4,707,852,905.48/78,129.36
  6. Step 6: Final answer
    x = 60,257.15

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1.5x scale

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.