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Finding the Fourth Proportional to 77,403.78, 106,821.54 and 58,249.13

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Solution

The fourth proportional to 77,403.78, 106,821.54 and 58,249.13 is: 80,387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,403.78 : 106,821.54 = 58,249.13 : x
  2. Step 2: Convert to fraction form
    77,403.78/106,821.54 = 58,249.13/x
  3. Step 3: Cross multiply
    77,403.78x = 106,821.54 × 58,249.13
  4. Step 4: Simplify right side
    77,403.78x = 6,222,261,236.15
  5. Step 5: Solve for x
    x = 6,222,261,236.15/77,403.78
  6. Step 6: Final answer
    x = 80,387.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.