Home / 105,486.42-145,571.46-57,742.80

Finding the Fourth Proportional to 105,486.42, 145,571.46 and 57,742.80

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Solution

The fourth proportional to 105,486.42, 145,571.46 and 57,742.80 is: 79,685.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,486.42 : 145,571.46 = 57,742.80 : x
  2. Step 2: Convert to fraction form
    105,486.42/145,571.46 = 57,742.80/x
  3. Step 3: Cross multiply
    105,486.42x = 145,571.46 × 57,742.80
  4. Step 4: Simplify right side
    105,486.42x = 8,405,703,700.49
  5. Step 5: Solve for x
    x = 8,405,703,700.49/105,486.42
  6. Step 6: Final answer
    x = 79,685.17

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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.