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Finding the Fourth Proportional to 77,085.77, 115,612.76 and 29,684.60

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Solution

The fourth proportional to 77,085.77, 115,612.76 and 29,684.60 is: 44,520.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,085.77 : 115,612.76 = 29,684.60 : x
  2. Step 2: Convert to fraction form
    77,085.77/115,612.76 = 29,684.60/x
  3. Step 3: Cross multiply
    77,085.77x = 115,612.76 × 29,684.60
  4. Step 4: Simplify right side
    77,085.77x = 3,431,918,535.50
  5. Step 5: Solve for x
    x = 3,431,918,535.50/77,085.77
  6. Step 6: Final answer
    x = 44,520.78

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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.