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Finding the Fourth Proportional to 77,389.26, 115,928.36 and 40,375.50

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Solution

The fourth proportional to 77,389.26, 115,928.36 and 40,375.50 is: 60,482.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,389.26 : 115,928.36 = 40,375.50 : x
  2. Step 2: Convert to fraction form
    77,389.26/115,928.36 = 40,375.50/x
  3. Step 3: Cross multiply
    77,389.26x = 115,928.36 × 40,375.50
  4. Step 4: Simplify right side
    77,389.26x = 4,680,665,499.18
  5. Step 5: Solve for x
    x = 4,680,665,499.18/77,389.26
  6. Step 6: Final answer
    x = 60,482.11

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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.