Home / 105,489.42-145,575.60-57,745.82

Finding the Fourth Proportional to 105,489.42, 145,575.60 and 57,745.82

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Solution

The fourth proportional to 105,489.42, 145,575.60 and 57,745.82 is: 79,689.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,489.42 : 145,575.60 = 57,745.82 : x
  2. Step 2: Convert to fraction form
    105,489.42/145,575.60 = 57,745.82/x
  3. Step 3: Cross multiply
    105,489.42x = 145,575.60 × 57,745.82
  4. Step 4: Simplify right side
    105,489.42x = 8,406,382,393.99
  5. Step 5: Solve for x
    x = 8,406,382,393.99/105,489.42
  6. Step 6: Final answer
    x = 79,689.34

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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.