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Finding the Fourth Proportional to 77,426.40, 115,880.40 and 68,095.20

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Solution

The fourth proportional to 77,426.40, 115,880.40 and 68,095.20 is: 101,914.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,426.40 : 115,880.40 = 68,095.20 : x
  2. Step 2: Convert to fraction form
    77,426.40/115,880.40 = 68,095.20/x
  3. Step 3: Cross multiply
    77,426.40x = 115,880.40 × 68,095.20
  4. Step 4: Simplify right side
    77,426.40x = 7,890,899,014.08
  5. Step 5: Solve for x
    x = 7,890,899,014.08/77,426.40
  6. Step 6: Final answer
    x = 101,914.84

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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.