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Finding the Fourth Proportional to 78,339.79, 117,529.12 and 36,738.19

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Solution

The fourth proportional to 78,339.79, 117,529.12 and 36,738.19 is: 55,116.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339.79 : 117,529.12 = 36,738.19 : x
  2. Step 2: Convert to fraction form
    78,339.79/117,529.12 = 36,738.19/x
  3. Step 3: Cross multiply
    78,339.79x = 117,529.12 × 36,738.19
  4. Step 4: Simplify right side
    78,339.79x = 4,317,806,893.19
  5. Step 5: Solve for x
    x = 4,317,806,893.19/78,339.79
  6. Step 6: Final answer
    x = 55,116.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.