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Finding the Fourth Proportional to 54,855.51, 75,700.22 and 30,986.84

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Solution

The fourth proportional to 54,855.51, 75,700.22 and 30,986.84 is: 42,761.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,855.51 : 75,700.22 = 30,986.84 : x
  2. Step 2: Convert to fraction form
    54,855.51/75,700.22 = 30,986.84/x
  3. Step 3: Cross multiply
    54,855.51x = 75,700.22 × 30,986.84
  4. Step 4: Simplify right side
    54,855.51x = 2,345,710,071.67
  5. Step 5: Solve for x
    x = 2,345,710,071.67/54,855.51
  6. Step 6: Final answer
    x = 42,761.61

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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.