Home / 105,489.99-145,577.79-57,747.78

Finding the Fourth Proportional to 105,489.99, 145,577.79 and 57,747.78

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Solution

The fourth proportional to 105,489.99, 145,577.79 and 57,747.78 is: 79,692.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,489.99 : 145,577.79 = 57,747.78 : x
  2. Step 2: Convert to fraction form
    105,489.99/145,577.79 = 57,747.78/x
  3. Step 3: Cross multiply
    105,489.99x = 145,577.79 × 57,747.78
  4. Step 4: Simplify right side
    105,489.99x = 8,406,794,189.81
  5. Step 5: Solve for x
    x = 8,406,794,189.81/105,489.99
  6. Step 6: Final answer
    x = 79,692.81

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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.