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Finding the Fourth Proportional to 55,520.86, 76,620.77 and 31,643.68

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Solution

The fourth proportional to 55,520.86, 76,620.77 and 31,643.68 is: 43,669.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,520.86 : 76,620.77 = 31,643.68 : x
  2. Step 2: Convert to fraction form
    55,520.86/76,620.77 = 31,643.68/x
  3. Step 3: Cross multiply
    55,520.86x = 76,620.77 × 31,643.68
  4. Step 4: Simplify right side
    55,520.86x = 2,424,563,127.23
  5. Step 5: Solve for x
    x = 2,424,563,127.23/55,520.86
  6. Step 6: Final answer
    x = 43,669.41

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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.