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Finding the Fourth Proportional to 78,134.40, 107,817.75 and 43,672.68

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Solution

The fourth proportional to 78,134.40, 107,817.75 and 43,672.68 is: 60,263.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,134.40 : 107,817.75 = 43,672.68 : x
  2. Step 2: Convert to fraction form
    78,134.40/107,817.75 = 43,672.68/x
  3. Step 3: Cross multiply
    78,134.40x = 107,817.75 × 43,672.68
  4. Step 4: Simplify right side
    78,134.40x = 4,708,690,094.07
  5. Step 5: Solve for x
    x = 4,708,690,094.07/78,134.40
  6. Step 6: Final answer
    x = 60,263.98

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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.