Home / 105,126.45-145,075.58-57,380.59

Finding the Fourth Proportional to 105,126.45, 145,075.58 and 57,380.59

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Solution

The fourth proportional to 105,126.45, 145,075.58 and 57,380.59 is: 79,185.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,126.45 : 145,075.58 = 57,380.59 : x
  2. Step 2: Convert to fraction form
    105,126.45/145,075.58 = 57,380.59/x
  3. Step 3: Cross multiply
    105,126.45x = 145,075.58 × 57,380.59
  4. Step 4: Simplify right side
    105,126.45x = 8,324,522,374.99
  5. Step 5: Solve for x
    x = 8,324,522,374.99/105,126.45
  6. Step 6: Final answer
    x = 79,185.80

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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.