Home / 105,489.31-145,575.41-57,745.68

Finding the Fourth Proportional to 105,489.31, 145,575.41 and 57,745.68

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Solution

The fourth proportional to 105,489.31, 145,575.41 and 57,745.68 is: 79,689.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,489.31 : 145,575.41 = 57,745.68 : x
  2. Step 2: Convert to fraction form
    105,489.31/145,575.41 = 57,745.68/x
  3. Step 3: Cross multiply
    105,489.31x = 145,575.41 × 57,745.68
  4. Step 4: Simplify right side
    105,489.31x = 8,406,351,041.73
  5. Step 5: Solve for x
    x = 8,406,351,041.73/105,489.31
  6. Step 6: Final answer
    x = 79,689.13

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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.