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Finding the Fourth Proportional to 77,276.90, 115,850.55 and 40,340.90

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Solution

The fourth proportional to 77,276.90, 115,850.55 and 40,340.90 is: 60,477.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,276.90 : 115,850.55 = 40,340.90 : x
  2. Step 2: Convert to fraction form
    77,276.90/115,850.55 = 40,340.90/x
  3. Step 3: Cross multiply
    77,276.90x = 115,850.55 × 40,340.90
  4. Step 4: Simplify right side
    77,276.90x = 4,673,515,452.50
  5. Step 5: Solve for x
    x = 4,673,515,452.50/77,276.90
  6. Step 6: Final answer
    x = 60,477.52

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1.5x scale

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.